Dyspepsia after drinking protein powder may be caused by physiological factors such as consuming too much protein powder at one time and pathological factors such as allergy and chronic intestinal inflammation. It can be relieved and treated by avoiding the intake of stimulating foods such as alcohol, stopping the dietary treatment such as protein powder, and taking drugs such as Bacillus subtilis bacillus. 1. Physiological factors: after drinking protein powder diarrhea, it is recommended to have a light diet, eat more easily digestible food, such as thin rice, steamed bread, noodles and so on. It is not advisable to eat spicy hot pot, strong tea, alcohol, seafood and other spicy stimulating foods, so as not to stimulate the gastrointestinal mucosa, aggravate stomach pain, nausea, vomiting, diarrhea and other symptoms. 2. Pathological factors: If the diarrhea is caused by allergy to protein powder, you can stop using protein powder and take loratadine to relieve the symptoms. If the diarrhea caused by chronic enteritis, you can use intestinal microecological agents such as Bacillus licheniformis, Bacillus subtilis enterococci bacillus, Bifidobacterium lactis trilobacterium, etc. You can also use antidiarrheal agents such as montelukast to alleviate and treat the symptoms of diarrhea, abdominal pain and so on. After drinking protein powder diarrhea, it is recommended to consult a doctor for a clear diagnosis and targeted treatment. In addition, all of the above drugs should be taken under the guidance of a doctor, and should not be used without authorization.