Cold air around the navel may be caused by cold, enteritis or ulcerative colitis. 1. Cold: when patients are stimulated by cold air around the navel, it will lead to symptoms of cold air in the area, which may cause abdominal pain and diarrhea and other manifestations. 2. Enteritis: when unclean diet occurs, it may cause enteritis disease. Suffering from this disease after being stimulated by inflammation, may cause intestinal spasms, by the outside world when the slightest stimulation, can also appear around the navel there is cool air performance. 3. Ulcerative colitis: the cause of ulcerative colitis is not yet clear, may be related to infection and intestinal immune hyperactivity and other factors. After being affected by the disease, patients may also appear to have symptoms of cool air around the navel. Cool air around the navel may also be caused by other reasons, the patient should go to the hospital in time, choose the appropriate method of treatment.