Hi, this is Zak here I am a barrister in london. about 3 years back while talking on phone with my fiance i accidently put a cut inside my bum cheek by a sharp nail of my finger. now after 3 years it has taken the shape of a wound and when i apply betnovate -n on it, it remains ok . in case of pressure water on it the wound get swell and bleeds and pains, but after applying medicine on it becomes ok. now it did not bleed from six months but  do swell and pain when i wear tight pants or in case of presser water on it.
Hello there, I am Chat Doctor. So you need to go for local examination by a surgeon, so he can diagnose is there any collection of blood or pus. Sometimes if some foreign body like piece of nail is remain inside it also not allow the lesion to become normal. Further diagnosis is done after examination. So please visit your nearest surgery specialist. Hope I have given appropriate guidance to you. If you have any query you can consult me anytime. Give me star rating according to your satisfactory level. Thanking you.