There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Diverticulosis. 2  Ischemic colitis. 3  Inflammatory bowel disease.  Colon 1  cancer. Intestinal worm infestation.  Mesenteric artery 1  ischemia. Proctitis.  Ulcerative colitis.
If you guessed about a week, you are average, but you are wrong. In a new study, doctors who reviewed medical studies found that acute cough, sometimes called acute bronchitis, lasts an average of nearly 18 days.
How Long Do Colds Last? Cold symptoms usually start 2 or 3 days after a person has been exposed to a source of infection. People with colds are most contagious for the first 3 or 4 days after the symptoms begin and can be contagious for up to 3 weeks. Although some colds can linger for as long as 2 weeks, most clear up within a week.