Drinking soybean milk on an empty stomach, abdominal pain may be caused by acute gastroenteritis, food allergies, gastric ulcers and other diseases, need to be under the guidance of the doctor to carry out targeted treatment, such as general treatment, medication and so on. 1. Acute gastroenteritis: after eating spoiled soymilk there will be acute gastroenteritis, if accompanied by bacterial infection can be treated with ciprofloxacin, if the abdominal pain symptoms are serious, you can use scopolamine pain, diarrhea with symptoms of dehydration need to rehydration therapy. 2. Food allergy: patients who are allergic to soybean milk can experience abdominal pain after drinking soybean milk, can follow the doctor’s instructions to use levocetirizine, loratadine for anti-allergy treatment, allergy to severe hormone therapy such as methylprednisolone and other hormone therapy, in the future in daily life to avoid drinking soybean milk again. 3. Gastric ulcer: gastric ulcer patients can appear in the symptoms of abdominal pain after meals, can use omeprazole and other acid-suppressing drugs, magnesium alumina carbonate and other gastric mucosal protection agent treatment, daily life need to pay attention to eat more meals. Drinking soybean milk on an empty stomach, abdominal pain is recommended to go to the hospital, please ask the doctor to diagnose and clarify the cause of the disease.