- Abdominal pain
- Acid peptic disease
- Acid reflux
- Acute gastritis
- Anemia
- Appetite loss
- Bloating
- Blood in stool (Hematochezia)
- Bowel incontinence
- Celiac disease
- Clostridium difficile infection
- Collagenous colitis
- Colon adenocarcinoma
- Colon angiodysplasia
- Colon polyp
- Constipation
- Diarrhea
- Diverticular diseases
- Diverticulitis
- Duodenal ulcer
- Esophageal disorder
- Gallstones
- Gastritis (Stomach inflammation)
- Gastroesophageal reflux disease (GERD)
- Gastroparesis
- Heartburn
- Helicobacter pylori (H. Pylori)
- Hemorrhoids
- Irritable bowel syndrome (IBS)
- Lactose intolerance
- Lower gastrointestinal bleeding
- Lymphocytic colitis
- Lynch syndrome
- Rectal bleeding
- Rectal inflammation
- Rectal stricture
- Small intestinal bacterial overgrowth (SIBO)
- Stomach spasm
- Stress-induced gastritis
- Swallowing difficulty
- Upper gastrointestinal bleeding
- Villous adenoma
- Vomiting
- Colonoscopy
- Non-surgical hemorrhoid treatment
- Paracentesis
- PEG tube placement (Gastrostomy tube placement)