Eating cold watermelon after abdominal pain should be taken according to the specific causes of general treatment, drug treatment, common causes are gastrointestinal spasm, acute gastroenteritis, gastric ulcer. 1. Gastrointestinal spasm: eating cold watermelon can stimulate the gastrointestinal mucosa causing spasm and lead to abdominal pain, can be relieved by hot compresses on the abdomen, massage, drink warm water, etc., and in severe cases, you can take antispasmodic medications (such as pivacidium bromide) and so on. 2. Acute gastroenteritis: if the watermelon stored for a long time after the occurrence of spoilage can cause acute gastroenteritis leading to abdominal pain, this time by taking anti-infective drugs for treatment, such as norfloxacin. 3. Gastric ulcer: watermelon for the high sugar content of food, can cause an increase in gastric acid secretion, suffering from gastric ulcer can be induced pain, can be treated by taking acid-suppressing drugs (such as omeprazole), gastric mucosa protection drugs (such as magnesium aluminum carbonate). Eating cold watermelon after abdominal pain may also be related to other reasons, it is recommended to consult a doctor in a timely manner to clarify the cause, and standardized treatment under the guidance of the doctor. In addition, the above mentioned drugs should also be used under the guidance of a doctor.