Why Hindus wear the Tilak...
Without the worship of Sri Ganesh no work in Sanatan Dharma should begin. Likewise, no religious work should begin without a Tilak or Tika on the forehead. Chandan or sandalpaste, roli, kumkum, sindoor and sacred ash or Vibhuti can also be used as Tilak. The Tilak is used in various ways for different reasons. Without the Tilak, Sandhya, Puja, Deva Darshan, Tarpan and other religious activities should not be performed. There are thirteen places on the human body where Tilak can be placed however, it is only on the forehead that it is considered noble. The head is the summit of the body with the brain being the axis of the entire body. According to Hindu Astrology, Mesh Rashi or the House of Aries is on the forehead. The Lord of Mesh is Mars and his colour is Red. This is why Red Chandan and sindoor is placed as Tilak on the forehead.