There are many virtual lotuses of power locus in the human body. The one at the place between the eye brows is highly powerful (which could be felt). This highly sensitive point is protected with the kumkum or chandan dots. Shaivas adorn their forehead with the Holy Ash the one with medicinal power and spiritual meaning and the vaishnavas with the shri churnam and so on each indicative of something.
What are the Marks on the Forehead of Hindus?