Watermelon and grapefruit after eating the same abdominal pain, need to clarify the cause of the symptomatic treatment, the common causes are overeating, chronic gastritis, peptic ulcer and so on. Watermelon and grapefruit are common fruits, there is no contraindication between the two, usually can be eaten at the same time; if you eat the symptoms of abdominal pain, may be due to a large number of eating, indigestion and caused by the symptoms. Generally after a period of time, or moderate exercise, so that the food can be digested completely, and the symptoms of abdominal pain will improve, without special treatment. If you have a history of chronic gastritis, peptic ulcer, chronic pancreatitis, chronic cholecystitis, etc., after eating watermelon and grapefruit, the stimulation of food may trigger the onset of related diseases and cause abdominal pain, you need to complete the gastroscopy, abdominal ultrasound and other related examinations under the guidance of the doctor, to further clarify the cause of the disease and then symptomatic treatment. If it is caused by chronic gastritis, peptic ulcer and other diseases, you can follow the doctor’s advice to choose omeprazole, domperidone, magnesium aluminum carbonate and other drugs for symptomatic treatment; and caused by chronic pancreatitis, chronic cholecystitis and other diseases, you can usually choose to choose the levofloxacin, amoxicillin and other drugs to fight infections, and if necessary, to carry out surgical treatment. When the above symptoms appear, it is recommended to go to the hospital in time, and early standardized treatment.