Anal cancer is a cancer which arises from the anus, the distal opening of the gastrointestinal tract. Symptoms of anal cancer are pain in the anal area , bleeding ,itching and discharge from anus. Factors for anal cancer are anal intercourse chain smokers , human papilloma virus ( HPV) infection .
HPV is the most common STD in the world today.It spreads when there is a skin to skin contact during anal sex ,oral sex and vaginal sex with an infected person.HPV can cause genital warts as well as cancer in cervic ,vagina ,penis ,vulva and anus.