Irritable bowel syndrome, or IBS, is a common cause of constipation, nausea and bloating, according to the International Foundation for Functional Gastrointestinal Disorders, or IFFGD. Other symptoms of IBS include abdominal pain and diarrhea. IBS pain is caused by changes in bowel habits, including the frequency and consistency of bowel movements, and it can develop as a chronic or recurring condition.
Bloating and nausea are associated with acid reflux, which is caused by a variety of dietary and lifestyle factors, including eating certain foods, indulging in large meals, being obese or overweight, smoking, and drinking alcohol, according to WebMD. Medications such as aspirin, ibuprofen, muscle relaxers and some blood pressure medicines can also cause acid reflux and heartburn, which causes acid to regurgitate up into the throat. Over-the-counter antacids such as Alka-Seltzer, Maalox, Rolaids and Mylanta can help relieve the symptoms of acid reflux and heartburn, but they may also produce side effects such as diarrhea and constipation.
Bloating is often associated with conditions such as liver disease, diverticulitis, Crohn's disease, pelvic inflammatory disease and several types of cancer, according to Everyday Health. When bloating is accompanied by symptoms such as severe abdominal pain, blood in the stool, vaginal bleeding, weight loss or fever, it may indicate a more serious underlying condition. If severe abdominal pain and bloating accompanies nausea and vomiting, it may be the result of a potentially fatal obstruction in the bowels.