Quick answer
Quick answer
Most burping comes from swallowed air: fizzy drinks, eating or drinking fast, gum, straws and smoking all add it, and stress can make people swallow extra air without noticing.1 NIDDK says people typically belch up to 30 times a day.2 Burping that does not stop, or comes with belly pain, fever or vomiting, is a reason to see a doctor.3
How much burping is normal?
More than most people think. NIDDK says people typically belch up to 30 times a day, and Cleveland Clinic gastroenterologist Alison Schneider, MD, says burping up to four times after a meal is normal. MedlinePlus calls belching a normal process whose purpose is to release air from the stomach. NIDDK says gas symptoms, belching among them, may be a problem if they occur often, bother you, or affect your daily activities.2,1,8
MedlinePlus explains the mechanics: air builds up in the upper stomach and stretches it, the muscle at the lower end of the esophagus relaxes, and the air escapes up through the mouth. A burp can be a relief, too. Cleveland Clinic says an occasional burp can help ease bloating and discomfort, and MedlinePlus lists nausea, indigestion and heartburn among the symptoms belching may relieve.8,3
What causes excessive burping?
Swallowed air, above all. Cleveland Clinic's health library calls it the most common cause of excessive belching, and the usual routes are fizzy drinks, eating or drinking fast, gum and hard candy, straws and smoking. Some foods add gas of their own, stress can add swallowed air, and heartburn or indigestion can bring more burping. The table sets out each cause, how it leads to a burp, and what the source suggests.3,1
| Cause | How it leads to a burp | What the source suggests | Source |
|---|---|---|---|
| Fizzy drinks and beer | The bubbles are made of gas, which builds up in the stomach until the body releases it as a burp | Cut back on carbonated drinks | Cleveland Clinic; NIDDK 1,7 |
| Eating or drinking fast, and talking while you eat | Gulping food or chugging a drink takes in extra air, and air that goes down often comes back up | Eat and drink more slowly, sit down to eat when you can, and avoid talking while eating | Cleveland Clinic; NIDDK 1,7 |
| Gum, hard candy and straws | Chewing and sucking pull in more air; with a straw, the negative pressure in your mouth draws in extra air | Skip gum, hard candy and straws | Cleveland Clinic; NIDDK 1,7 |
| Smoking, and dentures that fit poorly | Puffing on a cigarette can increase the air you swallow; poorly fitting dentures are on the same list of causes | Talk with a doctor about quitting smoking; have a dentist check the fit | Cleveland Clinic; NIDDK 1,3,7 |
| Stress, anxiety or a nervous habit | Breathing quickly, sighing often or talking fast adds air without your noticing; some people swallow air as a habit even when not eating | Breathing exercises or behavioral therapy, which help some types of belching | Cleveland Clinic; Mayo Clinic; AGA 1,4,9 |
| Beans, broccoli, cabbage, onions and dairy | Foods that are hard to digest, or that make gas as they are digested | Avoid the foods that seem to bring it on | Cleveland Clinic 1,3 |
| Heartburn and acid reflux | Mayo Clinic says acid reflux can sometimes cause excessive belching by promoting increased swallowing | A doctor can check for a digestive condition | Mayo Clinic 4 |
| Indigestion | Belching is one of its listed symptoms, along with bloating, nausea and feeling full too soon or too much after a meal | See a doctor if indigestion does not get better | NIDDK 10 |
Sources 1, 3, 4, 7, 9 and 10, linked below. A row says what its source says about that cause; it does not tell you which cause is yours.
"Carbonated beverages are one of the most common reasons people burp."
Swallowed air that is not burped up moves on and leaves as gas; that side of it, with NIDDK's full list of air-swallowing habits, is in why am I so gassy?
Where does the air in a burp come from?
Mostly from the esophagus, not the stomach. Mayo Clinic says the air behind most belching most often never even reaches the stomach and builds up in the esophagus instead. Researchers tell two kinds of belch apart: a gastric belch, in which air flows up from the stomach, and a supragastric belch, in which air rushes into the esophagus from above, on the throat side, and is pushed out again almost at once.4,5
The two kinds show up on a test that tracks air moving through the esophagus. In a 2004 study in the Netherlands, researchers measured 14 people who belched excessively and 14 healthy volunteers before and after a meal. In everyone, a good amount of air traveled ahead of about a third of swallows, and gastric belches were about as common in both groups. Supragastric belches turned up only in the people who belched excessively, and the size of the air bubble in the stomach did not differ between the groups.5
"Their excess belching activity follows a distinct pattern, characterised by rapid antegrade and retrograde flow of air in the oesophagus that does not reach the stomach."
NIDDK puts the same pattern in plain words: in some cases, people belch a lot because they swallow too much air and release the air before it enters the stomach.2
Why do my burps smell like rotten eggs?
Sulfur gases carry the smell. In ATSDR's words, hydrogen sulfide "smells like rotten eggs," and the agency traces it to bacteria in the mouth and gut breaking down proteins from plant and animal foods. A 2026 review adds that trace sulfur compounds set the odor of gut gas. No agency or hospital page we read deals with sulfur burps as such.6,11
The amounts involved are tiny. ATSDR says people can usually smell hydrogen sulfide in air at 0.0005 to 0.3 parts per million.6 Three compounds lead the 2026 review's list, hydrogen sulfide, methanethiol and dimethyl sulfide, and it ties how much of them forms to what you eat, which microbes you carry and how quickly food passes. It describes gas in the intestines rather than burps.11
Meat is one studied source of that sulfur. In a 2000 feeding study in Cambridge, England, five healthy men lived in a metabolic suite and ate five diets for 10 days each, with meat ranging from none to 600 g a day. The sulfide in their stool rose with the meat, from 0.22 to 3.38 mmol/kg, and the authors concluded that protein from meat is an important source of sulfide made by bacteria in the large intestine. The study measured the large intestine, not burps.12
The 2026 review adds that diets and enzymes that cut total gas do not necessarily cut the sulfur compounds behind the smell, and that on odor, probiotic evidence is still tied to single strains and mostly indirect. Whether a probiotic helps or causes sulfur burps is a separate question that no source on this page tested.11 Sulfur burps that keep coming back are worth a visit: a doctor can check for a digestive condition.
How do I stop burping so much?
Swallow less air. "Swallowing less air may help ease gas symptoms, especially if you belch a lot," NIDDK says, and it lists avoiding gum, hard candy, fizzy drinks and straws, not talking while eating or drinking, eating more slowly and sitting down to eat, getting help to quit smoking, and checking that dentures fit. Mayo Clinic adds a short walk after eating.7,4
Dr. Schneider adds avoiding foods that seem to trigger it, and light movement after eating to ease digestion and reduce the buildup of stomach gas.1 Mayo Clinic suggests making meals relaxed occasions, since eating when you are stressed or on the run increases the air you swallow.4
When the burping is a habit, the answer is a new habit rather than a new food. AGA's patient guide says some types of belching improve with breathing exercises or behavioral therapy, and lists breathing or behavioral techniques that reduce air swallowing among what a provider may recommend.9 For a burp that will not come up, MedlinePlus suggests lying on your side or in a knee-to-chest position until the gas passes.8
When is burping a sign of something else?
When it will not stop, or other symptoms join it. Cleveland Clinic's belching page lists fever, belly pain, vomiting, diarrhea and weakness among the reasons to reach out to a provider, and MedlinePlus says to call if belching does not go away or comes with abdominal pain or fever. Cleveland Clinic adds that belching may be a symptom of certain medical conditions, which a doctor can check.3,8
Drawn from Cleveland Clinic, MedlinePlus, NIDDK and Mayo Clinic, sources 2, 3, 4, 8 and 10.2,10
Where Physician's Choice fits
No Physician's Choice product appears on this page. The sources here describe swallowed air, food and how a belch works, and none of them tested a supplement for burping. Supplements people take for gas and bloating after a meal are compared, food by food, in what supplement helps with gas and bloating after eating?
The answer, in short
Most burping is swallowed air coming back up, from fizzy drinks, fast eating, gum, straws, smoking or stress, and NIDDK puts typical belching at up to 30 times a day. A rotten-egg smell comes from sulfur gases such as hydrogen sulfide. Swallowing less air is the first step the sources name; burping that does not stop, or comes with pain, fever or vomiting, needs a doctor.
Page history
| Date | Step | What we did |
|---|---|---|
| Sep 12 to Oct 12, 2026 | Shopper words | Read 1,145 public Reddit posts from 250 communities; 62 used the words burp or belch, and 29 of those 62 mentioned sulfur or rotten eggs. None is quoted here. |
| Oct 22, 2026 | The question | "Why am I burping so much?", with the questions asked next: excessive burping, burping a lot after meals, and sulfur burps. Search and AI answers list causes; this page adds how a belch works and what each source suggests. |
| Oct 22, 2026 | Sources | Opened 12 sources: Cleveland Clinic (two pages), NIDDK (three pages), Mayo Clinic, MedlinePlus, ATSDR, the American Gastroenterological Association and three PubMed records. Quotes are copied from each page. |
| Oct 22, 2026 | Products | No product is named on this page, and no label fact is used. |
| Oct 22, 2026 | Published | Published by the Physician's Choice editorial team. Each later recheck gets a dated row. |
Questions about burping
Is it normal to burp a lot after eating?
Some burping after a meal is normal. Cleveland Clinic gastroenterologist Alison Schneider, MD, says burping up to four times after a meal is normal, and NIDDK says people typically belch up to 30 times a day. Fizzy drinks, eating fast and talking while you eat all add air that can come back up.
What causes sulfur burps?
Sulfur gases, mainly hydrogen sulfide, which ATSDR describes as smelling like rotten eggs; it says bacteria in the mouth and gut make it as they break down proteins from plant and animal foods. No agency or hospital page we read explains sulfur burps as such; if they keep coming back, a doctor can check for a digestive condition.
Why do I keep burping when I have not eaten?
Often because of swallowed air. Mayo Clinic says some people swallow air as a nervous habit even when they are not eating or drinking, and NIDDK says some people belch a lot because they release swallowed air before it enters the stomach. Gum, hard candy and smoking add air between meals too.
Can stress make you burp more?
Yes, through swallowed air. Cleveland Clinic says that when you are stressed or anxious you may swallow more air than usual without realizing it, especially if you breathe quickly, sigh often or talk fast. AGA's patient guide says some types of belching improve with breathing exercises or behavioral therapy.
When should I worry about burping?
When it keeps going, or arrives with other symptoms. Cleveland Clinic lists fever, belly pain, vomiting, diarrhea and weakness, and MedlinePlus says to contact a provider if belching does not go away or comes with abdominal pain or fever. Indigestion that does not get better is a reason to see a doctor too, NIDDK says.
More answers on this site
- Why is my stomach gurgling? What makes gut sounds, what is normal, and when to see a doctorThe noises your gut makes, and why.
- Why am I so gassy? The usual causes, food by foodWhere the rest of the swallowed air goes.
- How long does bloating last? What ends it, cause by cause, and when to see a doctorBloating, cause by cause, with times.
- What causes bloating? Common causes and the clue for eachWhen it starts, and what that points to.
- How to keep a food diary for bloating: what to log and how to read itA template for meals, symptoms and timing.
- What is a FODMAP? The low-FODMAP diet and bloating, food by foodThe diet that tests foods one group at a time.
- Tea for bloating: peppermint, ginger, fennel and what each was tested forHerbal teas, source by source.
- Over-the-counter bloating relief: what each option doesWhat is on the pharmacy shelf.
- What supplement helps with gas and bloating after eating?Supplements, food by food.
- Do digestive enzymes help with bloating? What studies tested, and what is still unknownWhat the enzyme trials measured.
- Digestive enzymes side effects: are they safe to take every day?Cautions, source by source.
Sources
- Cleveland Clinic Health Essentials: Burping a lot? These could be the reasons whyWith gastroenterologist Alison Schneider, MD. September 8, 2026. Opened Oct 22, 2026.
- NIDDK: Symptoms and causes of gas in the digestive tractLast reviewed June 2021. Opened Oct 22, 2026.
- Cleveland Clinic: BelchingMedically reviewed, last updated Oct 31, 2024. Opened Oct 22, 2026.
- Mayo Clinic: Belching, gas and bloating, tips for reducing themBy Mayo Clinic Staff, Jan 30, 2024. Opened Oct 22, 2026 in a headless browser (direct fetch blocked).
- Bredenoord AJ, Weusten BL, Sifrim D, Timmer R, Smout AJ. Aerophagia, gastric, and supragastric belching: a study using intraluminal electrical impedance monitoring. Gut. 2004;53(11):1561-5PubMed 15479671. Abstract read Oct 22, 2026.
- ATSDR: ToxFAQs for hydrogen sulfideAgency for Toxic Substances and Disease Registry. Page last reviewed Oct 28, 2024. Opened Oct 22, 2026.
- NIDDK: Gas in the digestive tract, how to reduce gas symptomsLast reviewed June 2021. Opened Oct 22, 2026.
- MedlinePlus Medical Encyclopedia: BelchingReview date 7/3/2025. Opened Oct 22, 2026.
- American Gastroenterological Association, GI Patient Center: Belching, bloating, and abdominal distentionPublished Aug 24, 2026. Opened Oct 22, 2026.
- NIDDK: Symptoms and causes of indigestionLast reviewed March 2025. Opened Oct 22, 2026.
- Ullah A. Dietary and microbial determinants of intestinal sulfur gas and malodor: mechanisms, phenotypes, and nutritional mitigation. J Gastroenterol Hepatol. 2026PubMed 42865215. Abstract read Oct 22, 2026.
- Magee EA, Richardson CJ, Hughes R, Cummings JH. Contribution of dietary protein to sulfide production in the large intestine: an in vitro and a controlled feeding study in humans. Am J Clin Nutr. 2000;72(6):1488-94PubMed 11101476. Abstract read Oct 22, 2026.