Question: what are the common ailments of digestive system?
Answer: Gastroesophageal Reflux Disease (GERD) When stomach acid backs up into your esophagus — a condition called acid reflux — you may feel a burning pain in the middle of your chest. ... 
Gallstones. ... 
Celiac Disease. ... 
Crohn's Disease. ... 
Ulcerative Colitis. ... 
Irritable Bowel Syndrome. ... 
Hemorrhoids. ... 
Diverticulitis.