Having four bowel movements a day may be a normal physiological condition, or it may be caused by acute gastroenteritis, ulcerative colitis, tumors and so on. If you eat too much in a day, or intake of drugs or foods that promote gastrointestinal peristalsis, there is a possibility that you may relieve your bowels four times a day, which is normal. If acute gastroenteritis is caused by unclean diet, it may result in abdominal pain and increased frequency of bowel movements, but usually the symptoms can be relieved after symptomatic treatment. Colorectal tumors can have changes in bowel habits, including increased stool frequency and changes in stool characteristics, and can last for a long time. Ulcerative colitis is a type of inflammatory bowel disease and is characterized by recurrent episodes of diarrhea, mucus, pus and blood stools, and abdominal pain, and the number of bowel movements in a day may be more than four. An increase in the number of bowel movements that occurs only occasionally is usually normal; if it occurs for a long period of time, please go to the hospital promptly.