References. 1  Post-nasal drip. 2  Peters AT, et al. 3  Stuffy nose. 4  Nasal congestion and rhinorrhea. 5  Peden D. An overview of rhinitis. 6  Marx JA, et al., eds.
Common causes of lower abdominal pain include appendicitis, irritable bowel syndrome, ovarian cyst, diverticulitis, constipation, cystitis, period pain, endometriosis, pelvic inflammatory disease, bowel obstruction, ectopic pregnancy, miscarriage and inflammatory bowel diseases.
Some of the less common causes of Protruding abdomen may include: 1  Constipation. 2  Chronic constipation. 3  Poor muscle tone.  Poor muscle tone after 1  childbirth. Lactose intolerance.  Food 1  allergies. Food intolerances. 2  Pregnancy. 3  Hernia. Malabsorption.  Irritable bowel 1  syndrome. Colonic bacterial fermentation. 2  Gastroparesis. Diabetic gastroparesis.