What causes gas?

Swallowing air during eating or drinking travel through digestive tract when it burped up not. It is then exit through the anus. When we swallow air excessively it may cause hiccups.

Swallowing air during eating or drinking travel through digestive tract when it burped up not. It is then exit through the anus. When we swallow air excessively it may cause hiccups.

Swallowing air during eating or drinking travel through digestive tract when it burped up not. It is then exit through the anus. When we swallow air excessively it may cause hiccups.

Swallowing air during eating or drinking travel through digestive tract when it burped up not. It is then exit through the anus. When we swallow air excessively it may cause hiccups.