I had a history of piles and fissure...there is a small lump inside the skin just side of anus... earlier i could feel the lump deep inside but now it has come closer to surface... doctor says it's piles .i told him to do colonoscopy but he refused...I'm worried if it's fistula..there is no discharge or blood in still .just Little pain and irritation inside anus ..please help..lump is under the skin in red circle...