If your burps stink (say, like rotten eggs) it could be something you ate—or a sign of a food intolerance, stomach infection, or digestive disorder.

Frequent sulfur burps may be the sign of something more serious. Causes can vary and may include your diet or behaviors, or an underlying medical issue.

Sulfur burps have a foul, rotten egg smell due to the presence of hydrogen sulfide gas. This gas may be a byproduct of digestion or the result of an underlying gastrointestinal issue.

Mounjaro, like other GLP-1 drugs, may cause sulfur burps in some people. Learn what causes this side effect and how you can reduce it.

Sulfur burps appear to be a somewhat rare side effect of semaglutide, tirzepatide, and other drugs in their class, known as GLP-1 receptor agonists.