The glans pigmentation generally does not appear red phenomenon, long-term friction may lead to pigmentation, appear red and black phenomenon, glans redness may be with the glans and other diseases such as inflammation of the glans. Generally the glans is subjected to long-term friction, may lead to pigmentation, thus appearing red and black phenomenon, generally belong to the normal physiological phenomenon, do not worry too much. If the glans is red, it may be caused by glansitis, which is usually caused by infection, excessive frequent masturbation, bad sex life and other factors. Patients with glans can experience redness of the glans due to the long-term stimulation of inflammatory mediators. Can be used under the guidance of the doctor, such as isacridine, miconazole and other drugs, if the patient with glansitis has a long foreskin, it is necessary to take the surgical method of treatment. It is recommended that men should pay attention to keep the local cleanliness in daily life, to avoid infection leading to adverse consequences. If you have any discomfort, please consult the hospital in time to avoid delay.