Drinking protein powder diarrhea may be gastrointestinal dysfunction, allergic reaction, organic intestinal disease, first suspend drinking, adjusting life diet and treatment of primary disease. 1. Gastrointestinal dysfunction: protein powder is purified soy protein, diarrhea may be a large number of consumption, fasting consumption, nervousness and other causes of indigestion, you can adjust the diet, do not eat on an empty stomach, to avoid overeating and spicy stimulating food, relaxation, can be taken orally to regulate the intestinal flora of probiotic bacteria, such as: bifidobacteria. 2. Allergic reaction: eating protein powder diarrhea may be caused by allergy, to suspend consumption, oral cetirizine hydrochloride tablets, loratadine tablets and other anti-allergy. 3. Organic bowel disease: common peptic ulcer, Crohn’s disease, intestinal cancer, etc. will have diarrhea symptoms, it is recommended to actively treat the primary disease, stop eating, pay attention to replenish water, electrolytes and nutrients. Drinking protein powder diarrhea, there may be other reasons, it is recommended to consult a doctor in a timely manner, by the doctor to identify the cause of a clear diagnosis, symptomatic treatment, do not unauthorized use of medication, so as not to cause adverse consequences.