prostatitis should not cause redness/soreness at the tip of the penis so you are correct. there is likely another cause. unfortunately it would not be possible to determine a specific cause blindly over the internet based solely on your very brief description. you will need to see your medical provider again not just because of this redness/soreness but because you apparently have not responded to three weeks of antibiotics for your prostatitis. you may want to consider seeing a urologist. it's probably just some ordinary skin irritation. try using a penis health creme called man1 man oil. it specializes in penis skin issues like this and will get things back to normal quickly and safely. it was a good move to get an std test. you can rule that stuff out. try the creme!
can prostatitis cause redness on the tip of the penis? . experiencing pain/soreness and sensitivity on penis head also redness sometimes. i have been told it may be prostatitis but i am beginning to worry it is something worse (herpes? ). gonnohrea and chlamydia tests negative. has not responded to cipro after 3 weeks of treatment.