If the cold air in the anus may be caused by anal sinusitis, it is necessary to promptly undergo surgery to drain the pus, or it may be caused by hemorrhoids, take oral hemorrhoid speeding tablets, three yellow tablets, and acacia flower powder for treatment. The common parasite is pinworm, which needs to be treated with pinworm treatment to avoid aggravation of the condition and infection of the surrounding skin. It may also be caused by the aggravation of dampness in the patient’s body. Anal coldness has a lot to do with poor living, eating habits and constipation, so have a regular life, eat more fresh vegetables and fruits, and try to eat less greasy and spicy food. Considering that a variety of causes can cause this symptom, it is best to go to a professional hospital to check the stool routine and need timely medication to avoid further deterioration of the situation.