Welcome to HealthcareMagic. Tickling
around the anal region could be due to various reasons like fissure-in-ano, a fistula
, a hemorrhoid/ Piles, Worms(threadworms/Pinworms). If you are Diabetic, then this also might be the cause, or a genital wart
, a fungal infection. Most of all, it sounds like a Fissure or worms. So do go to a surgeon/ proctologist
and get yourself seen. Get well soon.