Constipation after diarrhea is associated with irritable bowel syndrome, medication and other diseases. The human body does not alternate between constipation and diarrhea, but this situation is mainly considered to be related to irritable bowel syndrome, which is a relatively common disease of the gastrointestinal tract and a typical functional disease. Bad emotions, diet, stimulation of the intestinal tract may lead to the recurrence of the disease, mainly manifested as abdominal pain, bloating, diarrhea, constipation and other performance, the symptoms of abdominal pain can be relieved after defecation. Poor dietary habits, abdominal cold, and intestinal bacterial infections can cause diarrhea in patients. You can take anti-diarrheal drugs, such as montelukast. After taking too much medicine or diarrhea, the process of intestinal adjustment can easily lead to constipation. Eating more fresh vegetables, fruits and coarse fiber foods in the diet or supplementing intestinal probiotics, such as bifidobacteria, can improve the symptoms.