Thaipusam is a sacred occasion for the devotees to take time to fulfil their vows to Lord Muruga for wishes granted and also to pray for specific wishes with vows.
The devotees go through various stages of self-purification through prayers and self-abstinences in order to fulfil their vows on the holy day.
Some devotees may choose to offer prayers by climbing up the stairs of Batu Caves with a milk pot on the head.
Some others may carry the Kavadi or have a chariot hooked onto their bodies as they go into a trance and walk to the temple.
Source: The Star