The main causes of chronic diarrhea and unformed stools are irritable bowel syndrome, intestinal inflammation and intestinal cancer. Commonly used treatments include inhibiting intestinal spasms, eliminating inflammation and removing tumors. 1. Irritable bowel syndrome: patients with irritable bowel syndrome will have long-term diarrhea and unshaped stools because of hyperactive intestinal peristalsis. At this time, it is necessary to take antispasmodic drugs, such as loperamide hydrochloride capsules, compound difenocoumarol tablets, scopolamine butylbromide capsules and so on. 2. Intestinal inflammation: patients suffering from intestinal inflammation such as enteritis, because the intestinal mucosa absorption capacity decreased, there may be prolonged diarrhea, stools are not shaped phenomenon. You can take anti-infective drugs like norfloxacin capsules, levofloxacin hydrochloride capsules and ciprofloxacin hydrochloride tablets. 3. Bowel cancer: Patients with bowel cancer, including colon cancer and rectal cancer, will have long-term diarrhea and unformed stools. Usually, surgery is needed to remove the tumor. Patients with long-term diarrhea and unformed stools should go to the hospital in time to find out the cause of the disease, and then actively cooperate with the professional doctors for the treatment of the cause.