Severe constipation for a few days without going to the toilet may be due to improper diet, mechanical intestinal obstruction, anal fissure, etc., should be directed at the cause of the treatment, improper diet to adjust the dietary structure, drink more water, according to the cause of the gastrointestinal decompression, surgery and other treatments. 1. Improper diet: long-term eating greasy, indigestible food, or a one-time overeating may cause indigestion, food is difficult to form feces out of the body, resulting in constipation for a few days not to go to the toilet, you should adjust the dietary structure, light diet, drink more water, eat more vegetables and fruits and other foods rich in dietary fiber. 2. Mechanical intestinal obstruction: intestinal tumors, foreign bodies, parasites, etc. lead to intestinal obstruction, food or feces downstream obstruction, resulting in constipation for a few days without going to the toilet, at this time should be temporarily fasting water, gastrointestinal decompression, according to the cause of the surgical treatment. 3. anal fissure: anal fissure patients due to the pain of defecation and fear of defecation, resulting in severe constipation for a few days without defecation, can be 1:5000 potassium permanganate warm water sitz bath, available liquid paraffin to improve constipation, if necessary, surgical treatment. Severe constipation for a few days without going to the toilet should go to the hospital, under the guidance of the doctor to clarify the cause and treatment.