In general, eating pears will not cause diarrhea, but if allergic to pears, poor cleaning, eating spoiled or rotten pears, and combined with the cold and other factors, may lead to diarrhea. Patients need to pay attention and go to the hospital to identify the specific causes before treatment. Common causes and treatment methods 1, cleaning is not clean: if the patient consumes the pear that has a lot of bacteria or pesticide residue on the surface due to unclean cleaning, it can cause diarrhea. At this time, the patient must promptly seek medical attention, can apply montmorillonite, aluminum thiosulfate and other drugs to relieve diarrhea symptoms; 2, eat spoiled, rotten pear: pear spoiled or rotten and then eaten, may cause the digestive system infection or food poisoning, resulting in diarrhea symptoms. After the relevant examination to confirm the diagnosis, need to carry out the corresponding treatment such as anti-infection under the guidance of professional doctors; 3, allergy: if allergic to pear, can appear diarrhea, and accompanied by rash, itching symptoms, patients can carry out allergen testing to determine the test results. If the diarrhea and rash are serious, you can follow the doctor’s advice to use anti-allergy drugs; 4, cold: pear is a cold fruit, if you eat pear when you have cold, it may induce digestive system related symptoms, such as diarrhea, vomiting, etc. Patients should go to the hospital in time to find out the cause of discomfort symptoms to exclude digestive system diseases, and need to follow the doctor’s advice for treatment, such as diarrhea is serious, can use montelukast antidiarrheal treatment. Attention should be paid to keep warm to prevent the abdomen from catching a cold, which can lead to diarrhea and other digestive symptoms. Patients need to pay attention to a light diet in daily life and avoid cold, greasy and spicy foods to avoid aggravating gastrointestinal discomfort. If diarrhea is caused by indigestion, bifidobacteria should be used as prescribed by the doctor to regulate the intestinal flora and promote the recovery of the body.