Science behind keeping Bindhi in forehead
The red dot is called a bindi. It is a form of body decoration. Culturally, Hindus attach a lot of importance to this ornamental mark and call it by various names pottu, bindi, tikka, tilakam and sindoor. There are various theories on why it is important and I will share a few here.
The 'Hot' Spot is the area between the eyebrows on the forehead is the spot of
'agna' chakra. In yogic science, this spot is considered as one of immense
power, often called as the third eye. It signifies a point of awakening and is
usually activated while pursing spiritual sciences. Ayurveda also believes
massaging this spot will relieve stress and insomnia.
The 'Magic' ingredient is traditionally kumkum (a mixture of turmeric and lime) or chandan (sandalwood) was used to mark a bindi. Kumkum is hygroscopic in nature and can greatly assist to remove excess water from one's head. Turmeric’s anti-bacterial properties are helpful too. Further, the color red is believed to aid spiritually.
On a religious note, the color red symbolizes 'shakti', the goddess of
strength. A kumkum is marked on girls after marriage denoting strength and wishing
for peace. Women and men have acupressure point in their fore head which when
pressed by the ring finger of right hand the acupressure point is pressed and
that nerve activates the brain.