The reasons for the redness of the urethral orifice are as follows: 1. The presence of local excessive friction, excessive stimulation, masturbation or the use of chemical disinfectants can cause redness of the urethral orifice, such as the use of alcohol for local disinfection, or long-term or excessive frequent masturbation, can lead to local redness, which can be accompanied by local tingling, or local mucosal erosion and other changes. If you have to remove the frictional stimuli, masturbation, chemical factors, etc., the redness of the glans or the redness of the urethra can gradually return to normal. 2, the presence of glansitis can appear redness of the urethra, and can be accompanied by redness and swelling of the glans around the urethra, or with increased secretions or with exudation and other changes, you need to carry out the relevant pathogenic examination to determine the cause of the infection. 3, acute urethral infection can also The urethral orifice is red, mostly accompanied by erosion of the inner wall of the urethra or with symptoms of frequent urination, urinary urgency, painful urination, and in severe cases, even with hematuria of the naked eye, requiring routine urine and urine culture laboratory tests to further confirm the diagnosis.