Patients with gonorrhea usually do not have the manifestation of glans redness, and patients can go to the hospital for a detailed examination to determine the cause of the disease. Gonorrhea is caused by infection with Neisseria gonorrhoeae. Patients may first have symptoms of urinary urgency, painful urination, and frequent urination, followed by redness and swelling of the urethra and purulent discharge from the urethra.