Colic after eating watermelon may be caused by intestinal spasm or gastroenteritis, intestinal spasm can be prescribed by the use of drugs such as bicyclic vilene hydrochloride, gastroenteritis can be treated with berberine hydrochloride and other drugs. 1. Intestinal spasm: intestinal spasm is usually associated with abdominal cold, indigestion and other factors, you can follow the doctor’s instructions to use Dicyclomine Hydrochloride, scopolamine and other drugs to treat, this kind of drug is often used to relieve the symptoms of gastrointestinal spasm. Excessive use will appear dry mouth, weakness and other adverse reactions. Patients who are allergic to these drugs should not use them. 2. Gastroenteritis: patients with gastroenteritis can use berberine hydrochloride, levofloxacin and other drugs under the guidance of a doctor, which are mainly used for the treatment of intestinal infections, digestive system infections and other intestinal diseases. Overuse will cause nausea, vomiting and other adverse reactions, and patients with allergies should not use them. It is recommended that patients with colic go to the hospital for timely examination and symptomatic treatment under the guidance of the doctor. Drugs should be used in accordance with medical advice.