A circle of red under the glans, if there is no redness, swelling, pain, itching, this circle of red may be underwear or masturbation stimulation caused by it, can be ignored, is the local capillary congestion caused by, do not need to treat. If this circle of red has pain, redness or a rash appears, it is likely to be a symptom of glansitis. It is common for patients who are circumcised and circumcised, because the normal secretion of secretions from the glans as well as the inner plate of the foreskin cannot be completely discharged, the formation of the foreskin scale, stimulating the glans, so it causes a circle of red under the glans, especially occurring itchy and painful. At this point it is essential to apply some medication, such as tacrolimus ointment, to relieve the symptoms. If the symptoms cannot be significantly relieved, the foreskin needs to be cut off and completely cured.