 [ Symptoms ] is it safe to have tb test when pregnant [ Disease ] prostatitis should not cause rednesssoreness 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 rednesssoreness but because you apparently have not responded to three weeks of antibiotics for your prostatitis you may want to consider seeing a urologist