Physical examination is a must . U need to avoid constipation and make sure that u don't strain while passing stools and have soft stools.  Drink plenty water and have adequate fiber in diet with regular exercise (atleast 30 mins every day) to ensure proper gut motility . U can take a deworming course if anal itching is an issue Taking sitz bath (sitting in a tub of lukewarm water for 10 mins twice a day )and Local anesthetic ointment per rectal application before defecation may help u . If problem persists consult local GI specialists for sigmoidoscopy and assessment