Drinking a lot of water every day or constipation may be caused by poor lifestyle, may also be caused by enteritis, intestinal tumors and other diseases. 1. Poor lifestyle: If in daily life, the dietary fiber of food is less, such as less intake of vegetables, often sedentary, inhibit bowel movement, may lead to drink a lot of water every day or constipation. 2. Enteritis: related to infection, immune abnormality, intestinal ischemia, heredity and other factors, the patient will have abdominal pain, bloody stool, malignant and other symptoms, if the lesion is located in the rectum, there will also be a feeling of anal distension, urgency and heaviness, which will lead to the phenomenon of constipation in some patients who drink a lot of water every day. 3. Intestinal tumors: may be related to genetics, infection, immunity and other factors, patients will experience varying degrees of abdominal pain, intestinal bleeding, weight loss, intestinal obstruction and other symptoms, which will lead to the patient to drink a lot of water every day or constipation. Drinking a lot of water every day or constipation has more causes, it is recommended that patients go to a regular hospital to clarify the cause of the disease.