what causes eggy burps
The terrible smell of sulfur burps is caused by hydrogen sulfide (H2S). The gas is known to originate from certain foods that contain sulfur proteins in them. During the process of digestion these proteins are broken down in the gastro-intestinal tract by sulfur-reducing microbes.entioned below are some of the different and most common sulfur burp causes. 1  Gastro-intestinal infection caused by the Helicobacter pylori bacteria or Giardia, which is a parasite, is one of the major causes of sulfur burps.