Frequent diarrhea with other symptoms may need to do colonoscopy, just frequent diarrhea can be temporarily treated with medication, temporary observation of the condition and the efficacy of medication, if the diarrhea continues to be unrelieved, then colonoscopy can be performed. In the frequent diarrhea and the emergence of vomiting, blood in the stool, stool is not shaped, stool with mucus, fever, body weakness, nausea and other symptoms, the body may have organic lesions, the need to do colonoscopy to check whether the body exists in enteritis, intestinal polyps or intestinal cancer and other diseases, and according to the results of the targeted treatment. But the body just frequent diarrhea symptoms, and no other abnormalities, may be related to changes in intestinal function, but also by stress, emotion, daily diet and other factors, you can first use montelukast to stop the diarrhea, as well as replenish the water electrolytes and other treatments, to observe changes in the condition, do not do the colonoscopy for the time being. If the diarrhea persists without relief, enteroscopy can be performed again. However, patients with frequent diarrhea need to go to the regular hospital in a timely manner, and the doctor will decide what tests to do.