Hey my penis hole has recently become swollen. I don t know what it is. It hurt to urinate at first but then flow was normal. My doctor gave me an antibiotic/omnicef and pyridium. I have been taking this medicine for 3 days now and I m still swollen and have trouble urinating at first because of the pain. What can I do about this and can I put something on the end of my penis for that swelling? Thank you for your help

Summarized question: What causes swollen urethral opening?