My penis tip.has. a burning sensation , .i can't even touch it after masturbation , there is no scar and it look exactly.normal , .what shall be done?

Consider Prostatitis: One of the causes of these complaints is an inflammation of the prostate gland, so called prostatitis. Symptoms that might occur with prostatitis include frequency of urination, slowing of the urinary stream, burning with voiding or ejaculation, burning in the penile tip unrelated to voiding, urethral discharge, sexual dysfunction (such as difficulty with erection), aching in the penis...