Coldness below the navel usually refers to coldness in the lower abdomen, which may be caused by improper diet, environmental factors, gastrointestinal dysfunction, gynecological inflammation and other reasons. 1. Improper diet: due to dietary intemperance, often eat cold, cold or not easy to digest and absorb food, resulting in insufficient nutrition and calorie intake, so there is a small abdominal cold. 2. Environmental factors: due to long-term in a cold, damp environment or too little clothing, can lead to the navel below the part of the cold, especially women do not pay attention to warmth during menstruation, it is very easy to cause the small abdomen cold. 3. Gastrointestinal dysfunction: Due to poor dietary habits and lifestyle, gastrointestinal dysfunction can be caused, resulting in loose stools, cold abdomen and vague pain. 4. Gynecological inflammation: Inflammatory diseases such as pelvic inflammatory disease, adnexitis, etc., can cause local blood circulation disorders, and the symptoms of cold abdomen will often appear during the attack. If you have a cold abdomen, you should go to the hospital in time, under the guidance of the doctor to improve the examination and treatment.