The glans is a little red, may be physiological phenomenon, external stimulation, may also be glans infection, allergies and other reasons. 1. Physiological phenomenon: penis in the state of erection, or sexual stimulation, the glans will appear congested state, so it will cause the glans a little red symptoms. 2. External stimulation: such as masturbation, external pressure and other factors can also lead to a little red glans. 3. glans infection: bacteria, trichomonas, candida virus and other pathogenic bacteria infection caused by the glans, can also cause the glans a little red performance. 4. Allergy: For example, contact dermatitis, drug rash and other allergic diseases in the glans area can also cause a little redness of the glans. If you find the glans a little red and other uncomfortable symptoms, please go to the hospital in time to check, follow the doctor’s instructions for treatment.