Urethral red is a disease condition, need to go to the hospital to check to clear: 1, urethral infection, when there is a local infection, can cause the urethral urethral redness and swelling, can be accompanied by mild pain in urination, or accompanied by the surface of the mucous membrane ulceration and so on, according to the degree of infection of different performance of the symptom is not the same, need to carry out a urinalysis examination, or swab around the urethral swab to exclude the presence of infection. 2, normal physiological conditions, the mucous membrane is slightly red, normal mucous membrane because there is a blood supply situation, so the performance of mucous membrane redness without any conscious symptoms. The normal physiological situation, the urethral mucosa slightly red, normal mucosa because there is a blood supply, so the mucosa red, without any conscious symptoms, is a normal phenomenon, not a disease. 3, excessive friction, such as the urethral opening and the foreign body excessive friction, can cause a slight redness in the mucosa, because after the friction of the local mucosal manifestations of excessive congestion. For excessive congestion, remove the related stimulus or friction factors, the urethra can be restored to normal, this situation is not a disease condition, do not need any treatment.