▁by ▁human ▁pap ill oma ▁virus . ▁Anal ▁w arts ▁are ▁usually ▁transm itted ▁by ▁un protected , ▁an ore cept ive ▁inter course . ▁ ▁Anal ▁w arts ▁may ▁be ▁asympt om atic , ▁or ▁may ▁cause ▁rect al ▁dis charge , ▁anal ▁wet ness , ▁rect al ▁ble eding , ▁and ▁pr ur it us ▁ani . ▁Les ions ▁can ▁also ▁occur ▁within ▁the ▁anal ▁canal , ▁where ▁they ▁are ▁more ▁likely ▁to ▁create ▁sympt oms . ▁ ▁Ch lam yd ia ▁ ▁The ▁b acter ium ▁Ch lam yd ia ▁tra ch om atis ▁can ▁cause ▁ 2 ▁conditions ▁in ▁humans ; ▁viz . ▁tra ch oma ▁and ▁l ym ph og ran ul oma ▁ven ere um . ▁Tra ch oma ▁can ▁cause ▁an ▁asympt om atic ▁pro ct itis , ▁but ▁the ▁sympt oms ▁of ▁l ym ph og ran ul oma ▁ven ere um ▁are ▁usually ▁more ▁severe , ▁including ▁pr ur it us ▁ani , ▁pur ul ent ▁rect al ▁dis charge , ▁hem ato che zia ▁rect al ▁pain ▁and ▁di arr he a ▁or ▁const ip ation . ▁L ym ph og ran ul oma ▁ven ere um ▁can ▁cause ▁f ist ulas , ▁strict ures ▁and ▁an ore ct al ▁abs cess es ▁if ▁left ▁un tre ated . ▁Hence , ▁it ▁can ▁be ▁confused ▁with ▁Cro hn ' s ▁disease . ▁ ▁Rect al ▁g on orr he a ▁ ▁Rect al ▁g on orr he a ▁is ▁caused ▁by ▁Ne isser