Hello,
Since you feel sensitivity in the penis when it touches your pants it indicates that there is inflammation in the
urethra. It may be due to over exercising (rough or vigorous
masturbation), poor hygiene, infection, prostrate, ureter,
urinary bladder problems or UTI, etc. You are suggested to get clinically examined by a
urologist. Take care of your hygiene. Get repeat
Urinalysis (R/E and C/S) and imaging tests done. Your treatment will depend on the pathology detected.
In the meantime, avoid vigorous or excessive masturbation so that inflammation reduces and you get more comfortable. You can take analgesics, one SOS when needed for relieve. Stay well hydrated. If sexually active avoid sex for a couple of days. You can take Syrup Alkacitron. It will give relief. Avoid addictions like alcohol, caffeine, artificial sweeteners and acidic foods or beverages. Stay active.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician