Do you know why people usually keep bindhis on fore head?

In Hindu and tantric/yogic traditions and other belief systems chakras are energy points or knots in the subtle body. They are located at the physical counterparts of the major plexuses of arteries, veins and nerves. Their name derives from the Sanskrit word for "wheel" or "turning", but in the yogic context a better translation of the word is 'vortex or whirlpool'.The area between the eyebrows (where the bindi is placed) is said to be the sixth chakra, ajna, the seat of "concealed wisdom". The bindi is said to retain energy and strengthen concentration.

From a health point of view, the Bindi is worn between the eyebrows where the pineal gland lies. This is an important nerve center and applying sandalwood or ash keeps the nerves cool and so keeps you cool and conserves energy. In the past the Bindi was made from the yellow and red sandalwood, red and yellow turmeric, saffron, various flowers, ash, zinc oxide. All these had cooling properties in nature. Today people wear Bindi is made with glue or glass and doesn't benefit in any way but is more of an accessory.

  So friends, when your mom and dad tells you to keep kumkum on the fore head, don't deny it as old fashion. Keep it, it improves your concentration power.