The glans has a piece of dark red color folds can be caused by inflammatory factors, non-inflammatory factors, tumors and other reasons. 1. Inflammatory factors: circumcision or circumcision, due to the accumulation of pollutants in the local area, or the occurrence of pathogenic infections, can be triggered by erosive glans, glans mucosa stimulated by inflammation can appear erythema-like manifestations of the skin can be changed from smooth to folds. 2. Non-inflammatory factors: plasma cell glans, erythema and hemangioma occurring in the glans, can appear in the glans with clearer erythema. 3. Tumor: when glans cancer or glans eczema-like cancer occurs, ulcers, pimples or cauliflower-like lumps may appear on glans, and the local skin color and texture may also be changed, which may be shown as dark red folds, and may be accompanied by tingling sensation and burning sensation, as well as bleeding and secretion exudation and other manifestations. When the glans has a piece of dark red folds, you should consult a doctor in time, under the guidance of a specialist to actively carry out appropriate treatment, which will help to relieve the discomfort symptoms as soon as possible.