The Jain Sadhus and Sadhvis after receiving the Diksha (initiation), pluck their hair after every four months in a year. They pluck their hair or they get the hair plucked by others. The hair on face and scalp are plucked. This is called Kesh-lochan or Loch. It is also considered as one kind of austerity where one bears the pain of plucking hair calmly.
This is done mostly in front of the lay-community. First they rub ashes on their head, then they pluck out the hair in bunches. Jains believe that plucking hair teaches them to endure pain. It can be done in private room, but it is done in public with the idea of motivating the people to take the path of renunciation.