In this condition there is a bag full of blood vessels in the wall of anal
canal which bleeds and protrude per anus during defeacation.
They are internal and external piles
The patient complains of blood in the stool gradually as the disease
progresses they feel a painless mass coming out from anus during
defeacation which recedes after defeacation of it needs to push
in manually.
Later it comes out from anus do not go in manually gives severe pain,
called as thrombosed haemorrhoid.