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Reasons for farting and belching

Foods that cause flatulence

Onions, tomatoes and mints actually relax the muscle at the lower end of the gullet, allowing air from the stomach to escape by belching.

Farting is more to do with bacteria in the lower bowel that are particularly partial to carbohydrates. The carbohydrates in some foods cannot be broken down and absorbed in the intestine; they pass straight through to the bowel, where they are fermented by the bacteria to produce gas that comes out as farting. Beans are famous for containing large amounts of unabsorbable carbohydrate, but other foods can have the same effect.
Some slimming chocolate contains sorbitol or fructose instead of sugar. Most of this is not absorbed (which is why these products are marketed for slimmers), but can be acted on by the large bowel bacteria to cause wind. Consumption of fruit juices is increasing and, because they contain a lot of fructose, they can cause gas and bloating.
Foods with a high proportion of unabsorbable carbohydrate that cause flatulence
  • Beans
  • Peas
  • Broccoli, cauliflower
  • Jerusalem artichokes and other root vegetables such as parsnips
  • Slimming foods that contain sorbitol or fructose
  • Raisins, prunes
  • Apples
  • Fruit juices (because of the fructose they contain)
Overeating, as we all know, leads to belching. This is because the stomach normally contains some air. When we overeat, the stomach attempts to relieve the discomfort and distension by expelling the stomach air upwards. This is a reflex over which we have no control.
Fizzy drinks and gulping hot drinks introduce gas into the stomach.
Habit. Some people suck a small amount of air into the oesophagus (gullet) or stomach by swallowing to make themselves belch, without realizing they are doing so (Gut 2004;53:1561). This habit often starts if there is a period of indigestion, when belching may temporarily relieve the discomfort.
Smoking, chewing gum and sucking on pen tops makes you produce more saliva, which has to be swallowed. Each time you swallow the saliva you also swallow air. Also, chewing gum contains sorbitol.
Tight clothing, such as Lycra shorts, constricting belts and hold-in underwear increase the pressure on the abdomen and make it more difficult for wind to pass along normally, resulting in trapped wind and belching.
Acarbose is a drug sometimes used for diabetes. It prevents enzymes in the gut digesting carbohydrates such as starch and sucrose. Because they are not digested, these carbohydrates are not absorbed (which is how the drug helps to lower the blood sugar). Instead, they pass down to the lower bowel, where they are fermented by the bacteria. Most people taking acarbose experience flatulence, tummy rumbles and a feeling of fullness.
Intestinal diseases are occasionally responsible. In lactase deficiency, for example, the enzyme that breaks down lactose, a carbohydrate found in milk, is lacking. The undigested lactose produces hydrogen and carbon dioxide when it reaches the large bowel, causing frothy diarrhoea, griping pains and flatulence.
Constipation can cause farting. Normally, most of the intestinal gas is expelled out of the anus as small puffs which we are not aware of. When we are constipated, the gas becomes trapped behind the faeces and then suddenly emerges as a noticeable amount. Also, when we are constipated, the food residues stay in the bowel for longer, and have more time to ferment and give off gases. (For more information, look at the section on constipation.)
Anxiety and tension seem to make wind worse. This is partly because when we are anxious we are hyper-alert, and notice body functions that we would otherwise ignore. Another factor is that when we are anxious we tend to swallow more air. Also, our guts become more active because of increased adrenaline levels and they expel the gases more forcefully.
Childbirth. After childbirth, the muscles of the anus or the nerves nearby can be damaged, making it difficult to hold wind in. This is much more common than many people realize. A study in Sweden found that 25% of women were unable to control wind 5 months after giving birth, particularly if they had a long labour. The problem did improve a few months later. Sometimes, there may also be some leakage of faeces (for more information, look at the section on faecal incontinence). If your problem started after having a baby and does not get better, see your doctor because an operation may cure the problem.
Ageing may make gas worse, because as we get older we do not produce digestive juices, such as saliva, as efficiently. This means that more carbohydrate foods pass untouched to the lower bowel, where they are fermented by the bacteria.

Written by: Dr Margaret Stearn
Edited by: Dr Margaret Stearn
Last updated: Tuesday, October 4th 2011


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Comments on this article

Posted by Pooty Tang on 28/03/2016 at 12:16

XD, I eat a lot of fruit and I bought about 6-10 packs of gum that I chew everyday. I'm constantly tooting! Well, i'm glad that there's probably nothing wrong with me atm.

Posted by Niamh on 15/02/2016 at 10:41

I suffer from ibs which cam cause a lot of wind which can be embarresing. Especially at school. Sometimes you camt hold it in. Its really hard but you get to live with it some times

Posted by Optional on 12/01/2016 at 07:41

I can't stop passing wind it smells raely bad and husband not happy with me cos I do all the time but I can't help it what can I

Posted by Windy on 17/12/2015 at 02:47

i pass wind a lot and it always smells very embarrising

Posted by Optional on 06/07/2015 at 04:17

My stomach has extended and hard, I've passing a lot of gas, small spurts of bowel movement and belching. Could this be a possible bowel assertion.

Posted by Southern Charm on 23/03/2015 at 03:20

I conquered it. I had to take the time to post my quick story because I suffered from non-stop, very foul-smelling farting for a few years. Total social embarrassment. I have now been almost fart-free for 6 months. If I do, it's only occasional and no longer smells like eggs and death. I had tried many OTC anti gas medicines and eliminating certain "problem foods" and nothing really worked.... until I did the following: 1) No dairy, except plain greek yogurt 2) No coffee/caffeine at all anymore 3) Stopped eating until I was "stuffed" at meals, especially protein. See, I have been lifting weights for years, so as any "bro" will tell you, you gotta eat big to get big, which is true. My problem was, I would only eat 3 meals a day, so I'd stuff myself at each meal. I believe this over-eating at each meal was the major problem. My body couldn't digest such a large amount of food at once, especially the large amount of protein, so some of it went through undigested, fermented in the intestine, and came out smelling like satan's wrath. (ask any bro at the gym about "protein farts"... they're sick) The other major issue for me was the coffee/caffeine I was consuming throughout the day. I gave it up completely about 6 months ago (when I also made the aforementioned dietary changes). Haven't farted since. Now, giving up coffee has been the hardest thing ever, but it's worth it for reasons beyond just not farting. It wreaks havoc on the digestive system. I read an e-book, I believe titled The Joy of Quitting Caffeine, and that helped me a lot. So now I eat smaller meal portions, about 5-6 times per day (still getting the same high amount of calories and protein). I also eat clean, no fried foods or processed junk. So it really came down to: 1)give up coffee/caffeine 2)don't gorge yourself, eat smaller more frequently 3) give up dairy I hope this helps people. I spent a long time trying to find the solution. For me this is definitely it. Also, when I first started on this new lifestyle 6 months ago, I flushed my digestive tract and ass out with an internal saltwater bath. It flushed out the junk that was lying dormant in my innards. Just google "internal salt water bath". Cheers :)

Posted by Optional on 30/01/2015 at 11:18

It might be due to weakness of the muscles of the body as in after car accidents. After I was involved in one, I was farting non-stop. I also had problem controlling my urine and the other one.

Posted by Optional on 27/01/2015 at 08:03

pain in stomach and farting constipition

Posted by Itzliddat on 17/01/2015 at 10:10

Would really like to thank this website for answering all my questions thanks alot!! :)

Posted by Optional on 17/01/2015 at 10:06

This helped me alot :) although I'm 12 I fart alot lol now I know what eat and what to not eat :) Thanks alot!!

Posted by fazz on 14/01/2015 at 11:03

I have a very bad problem breaking wind all the time,this is quite embarrassing,please help,

Posted by windbreaker300 on 13/01/2015 at 02:37

I have a very bad problem breaking wind during and after sexual activity. It has gotten to the point where my significant other doesn't want to be intimate any longer because of this. I'm in fear I will lose her over passing gas. Any advice? And be reminded, it just blows on out of there with major force as if there were a wind storm. Nothing intentional. Losing her if not fixed. Please help.

Posted by jewel on 13/01/2015 at 02:25

I have to say this is quite embarrassing,but for the past 2 years I have gas on a constant basis. It happens when I laugh, cough, sneeze, whatever. I have been in stores and restaurants and embarrassed myself and others. What can I do? Totally humiliating!

Posted by Realideasman on 06/01/2015 at 05:00

Another factor that may be worth looking into is Tension Myositis Syndrome - and condition of the mind and body that presents itself in many different ways - Irritable Bowel Syndrome being one of them. Dr John Sarno is the researcher and you might find some answers with his material. Bad bacteria feed on raw sugar and some yeast products. Cutting these foods from your diet in consultation with your preferred medical person will be of some assistance.

Posted by eww on 28/12/2014 at 05:09

I chew gum all the time and I never pop off

Posted by Not eating enough on 28/12/2014 at 07:51

I didn't see it mentioned but lack of calories hence muscle wasting to some degree depending on the amount of missing calories I believe can cause horrid smelling and plentiful gas. I have been experiencing the above type gas and I know I have not been eating nearly enough food. I am going to have to up my caloric intake and see if this goes away. Fwiw It just started about a week or so ago when I stopping eating enough and I just had a complete physical about 10 days ago and passed with flying colors. Best of luck to everyone.

Posted by Optional on 15/12/2014 at 11:36

Hey guys this varies on the severity of your situation but hot/warm water, tea without milk or sugar, green tea. Every day until you see improvement

Posted by Optional on 21/10/2014 at 01:28

How to prevent a rumbling tummy. It's so embarrassing

Posted by Optional on 02/10/2014 at 12:26

The reason why we all fart and burp so much is one you're all overlooking. I can guarantee that you've all got a lot worse since the internet was invented. That's because we're all sitting for longer periods looking at a computer screen for endless hours and at the same time squashing up our stomachs. The best answer would be to get more exercise and spend less time online. Unfortunately, the world has changed so it's unlikely to happen!

Posted by Optional on 29/09/2014 at 10:24

Having stinging like pains in upper abdominal area on both sides, also a lot of belching. What might be the cause?

Posted by tonyl on 29/09/2014 at 07:44

I cant seem to keep my true love. Every morning sometimes in the day I pass wind. I get a bulg in my right side of abdomen usually. it so depressing. Every day I feel tired after the wind has passed. Its almost ike this thing has ruined my life. Iv been to the doctor 10 times about but he dont seem to think much of it. Now my whole body smells of some weird smells obiously not normal and not many people stand next to me for long. Its makes me angry especialy when I get dumped by my sexy lady. I really wish my doctor would help me out here. I gave up smoking tried eating a balanced diet internet info no good sometimes eg brockoly is good sometimes bad doesnt make sense. What a life destroyer it really isnt funny im not laughing im going to end up in a nut house if it dont go away seriously I lost my girl.

Posted by Bev on 27/09/2014 at 02:48

Hello. I'm wondering if anyone can help. I'm 30 years old, female and gave been type 1 diabetic since the age of 17. From then I have suffered stomach problems, excessive wind (both ends lol) constipation, sometimes loose stools, bloating, and really smelly burps like rotten eggs. I have had tests done by the doctors but am no further forward. At first they thought it could be ibs and prescribed my mebeverine hydrochloride but made no difference, I cut out lactose but still no difference. Now it is driving me insane. It can happen every other day but sometimes I can go weeks or even a few months without any problems. Does anyone else suffer from this or have any advice please, not only is it affecting my day to day life but it is very embarrassing too, especially when my partner can't stand the smell of my burps,

Posted by Olivia on 06/06/2014 at 06:57

I pass wind a hell of a lot, & swelled hard stomach ?

Posted by rockchick on 05/06/2014 at 08:29

Seem to have wind loads and it smells

Posted by Optional on 28/05/2014 at 05:21


Posted by Optional on 08/05/2014 at 07:26

Thank you this very helped

Posted by Optional on 05/02/2014 at 08:47

I've had a problem with my bowels for as long as I can remember now and it's really beginning to annoy me and others. I had surgery around 5 years ago to fix a hiatus hernia in my stomach....could this be the cause? I'm either constipated with a massive ammount of wind or got the runs with wind( yes sometimes I follow through.. Especially at the weekend when I have a few pints Lol )Tried everything.... Please help.

Posted by cheryl on 09/12/2013 at 11:15

just had bowel surgery 2 weeks ago, (repositoning my stoma) now im finding im farting louder more than before and its really embarrassing.

Posted by grewal on 06/12/2013 at 04:17

really helpfull thanx doctor

Posted by Optional on 03/10/2013 at 06:52

Recently developed farting and burping and inability to swallow food. Started taking 2 Dennie's to see if it helps.

Posted by mukoso on 22/09/2013 at 08:39

I'm always pufing to much and have to much air in my stomach what is the cause

Posted by lee on 03/08/2013 at 01:01

thank you i produce a lot of saliver and eat to excess i intend to cut down on my food intake and have my main meal for lunch i should sleep better with less wind pain at night

Posted by babe on 21/04/2013 at 11:42

I have terrible bloating it gets so bloated that I look pregnant & it gets very painful,what can I do to stop this problem.& its really embarrasing as I can't hold the wind,I went for a colonoscopy,but they dint find anything,plz help

Posted by Optional on 19/04/2013 at 02:39

I think being over weight can cause a lots of gas.

Posted by Amanda on 08/04/2013 at 04:22

I've noticed a difference in the amount of gas I pass each day since going gluten free. I've also cut back on carbs in general. Also, I noticed someone asked something about fructose gas...unfortunately, the only thing you can do is cut down on fructose. Yes, fruits are good for us. That being said, most fructose people consume isn't straight from a piece of fruit...its from juices, teas or sodas with fructose added, fruit pastries, etc. Read the ingredient list on everything you usually eat or drink and just cut back on anything with added fructose.

Posted by Optional on 27/03/2013 at 12:24

I gave birth about a month ago it was a long labour and noticed about 2 days afterwards that I would pass alot of smelly wind and it hasn't stopped since. So embarrassing, I can't hold it back either. I feel I can't go anywhere where I will be close to people cause I know without warning I will accidently pass wind and it will smell. I know time will make things better and recovery is slow after carrying a child to term and having a long labour.. I read the fact sheet about it and was quite relieved to know I'm not the only one with this amazingly embarrassing problem...

Posted by Jummy on 20/02/2013 at 08:56

I don't usually fart before child birth but eversince I gave birth,I've been farting seriously. What can I do?

Posted by sue on 05/01/2013 at 11:00

does having celiac decease make you burp or fart?? especially at night? plus I have a little pain in my stomach.. thank you sue

Posted by Optional on 04/12/2012 at 12:57


Posted by Optional on 10/10/2012 at 04:24

Hi, I have a problem that every time I eat within say half an hour I am passing wind which is sometimes quite pungent! it seems to be all food that I eat, could it be an bacteria in the gut that i need to flush out, I have had colonic irrigation and that didn't seem to cure it, I really don't know what to do, should i perhaps take a pre-biotic or what could you suggest. Kind Regards Sally

Posted by Optional on 15/09/2012 at 06:45


Posted by belong PUNE on 18/08/2012 at 09:18

I have suffering farting problem last 15months. Please advice me as I am paient of Highblood pressure. Can Onion reduces farting. can turmeric power control farting thanks

Posted by Kosi maduekwe on 08/07/2012 at 08:03

I want to remove the gas in my stomach and also know the things i can eat and do not to have them because i want to be flexible

Posted by Optional on 12/06/2012 at 04:36

This has just started bout six months ago and is very embarrasing, i pass wind up to maybe 20 times every few days, also i think i may have IBS and this may be a factor to my problem, anyone help me please??

Posted by Jane on 10/06/2012 at 11:34

I've suffered from this embarrassing problem of excess wind for over 50 years, the last 10 years have been the worst as I now cannot control the passing of wind because of injuries that occurred when I gave birth 30 years ago, the nerves were damaged and now I'm getting old I can't control the farting. Very embarrassing in a quiet environment.

Posted by Trevor on 08/03/2012 at 01:56

i have this very very bad fart especially at night sometimes i dont even realise that i m farting when sleeping just hear the smell now my wife wants to sleep with kids could that be the reason of being diabetic or what.....and my age is fourty please help dont know what to do

Posted by Optional on 26/12/2011 at 04:48


Posted by Optional Helen on 10/11/2011 at 10:10

When I have a bad headache, i know it is starting to get better once i start belclhing, it seems to relieve the pressure. why ?

Posted by Optional on 23/10/2011 at 03:31

What can prevent it? The only 2 things that ring true are tension and anxiety and a lot of milk. Gas-X doesn't do a thing. I don't eat the normal foods that create these problems. lots of medications cause dry mouth causing me to chew gum a lot.

Posted by GLUTEN FREE-Celiac Disease on 27/09/2011 at 08:37, United States

This article was very interesting and helpful, although you did not mention other food allergies such as Celiac Disease. I was recently diagnosed, with just a simple blood test for the allergy to wheat. Celiac Disease is when your stomach cannot properly digest the ingredients wheat, barley, and oats(flour,malt). The villa hairs in the digestive system are burnt off from eating those ingredients. Since I have changed my diet, I have felt a huge difference in my digestive system and much more energy. My stomach is still in the healing process ( which can take up to a year or longer). The disease is very common and the symptoms can be extremely suddle. Some symptoms include consistant: fatigue,constipation, diahrea, gas, bloating,sickly paleness, and pimple like bumps on the arms.

Posted by Optional on 11/08/2011 at 09:18, United States

i never used to fart ever, and now i have been loseing weight ( i was a normal weigt for my height before) i have been eating really extra healthy and now i fart non stop? why?

Posted by vwexahe on 10/07/2011 at 06:14, United Kingdom

does masturbatin make passing wind more active.. i masturbate and den nned to go toilet after i hace ejacuted for a number 2 or pass alot of wind..

Posted by Optional on 28/06/2011 at 09:45, United Kingdom

With non reason ,my stomag is bigger people ask me if i am pregnat ,and i do fart a lot ,can you please help ?

Posted by Maximus on 13/05/2011 at 01:20, United Kingdom

D, who posted about being light headed. See your doctor asap. That doesn't sound normal at all. Good luck!

Posted by D on 13/03/2011 at 02:09, United Kingdom

I have been troubled all my life with wind , it seems to run in my family . But far a long time now when I pass wind its sooo forceful and makes me light headed . what would cause this

Posted by jan on 22/02/2011 at 08:14, United Kingdom

i need to stop the belching and worse farting as we are going on a 26 hour flight!

Posted by Val on 23/01/2011 at 05:47, South Africa

In the last 6 months or so I have started farting, mainly when I get up in the morning. I am very noisy! I would love to find a cure.

Posted by Optional on 13/01/2011 at 01:07, United Kingdom

Great information - very informative! Thank you.

Posted by alan on 09/12/2010 at 01:30, United Kingdom

huge amount of belching and farting and bloated nausea.Stools pretty normal but this incessant feeling of nausea getting me down .Any advice

Posted by Optional on 28/10/2010 at 09:21, South Africa

my stomach is all of a sudden full of gas (a lot) I fart constantly and the smell is really bad. I also have stomach cramps sometimes and some gastro

Posted by Anonymous on 29/09/2010 at 06:39, United Kingdom

I have suffered for years with chest and stomach pains and extreme flatulence and bloating caused by my inability to burp. I appear to be one of many who have this problem.Can you help as this is affecting my life considerably. Thank you

Posted by Muhammad Abul Hossain,PhD on 26/08/2010 at 12:01, Bangladesh

It is an illuminating article. I shall apply your suggestions and give you my feedback.

Posted by FRUITI FARTI on 19/08/2010 at 09:46, United Kingdom



View what people have said about wind | Reasons for farting and belching

Fascinating facts

Methane is one of the most potent greenhouse gases in the atmosphere. Cow's and sheep's wind is responsible for almost a third of the methane in Europe that passes into the atmosphere. A single sheep typically produces 25 litres of methane a day, while a cow can produce an amazing 280 litres a day (New Scientist 15 June 2002)

In the 1960s, NASA was worried that a build-up of hydrogen from astronauts' wind might accidentally explode in the spacecraft. This stimulated a lot of research into bowel gas

At any one time, there is about 200 mL (a mugful) of gas in each person's gut

Most people expel about 600 mL of gas/day, but some people produce up to 2 litres

Gut gases are 90% nitrogen; the remainder is carbon dioxide, hydrogen, methane and sometimes hydrogen sulphide

Healthy young men break wind 14-25 times a day and women half as often

Women produce stronger smelling flatus than men, but men produce a greater volume

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