Bindi

A bindi is a forehead decoration worn in South Asia.  Traditionally it is a bright dot of red color applied in the center of the forehead close to the eyebrows, but it can also consist of other colors with a sign or piece of jewelry worn at this location.

Traditionally, the area between the eyebrows (where the bindi is placed) is said to be the seat of "concealed wisdom". The bindi is said to retain energy and strengthen concentration. It is also said to protect against bad luck.

In modern times, bindi is worn by women of many religious dispositions in South Asia and Southeast Asia, and is not restricted to one religion or region. However, the Islamic Research Foundation, located in India, says "wearing a bindi is a sign of Hindu women. The Islamic dress code does not permit a Muslim to wear any sign, symbol or mark which is specially significant of a non-Muslim." 

Red represents honor, love and prosperity, hence it was worn traditionally by women to symbolize this.

Bindis are worn throughout India, by women, men, girls and boys, and no longer signify age, marital status, religious background or ethnic affiliation. The bindi has become a decorative item and is no longer restricted in colour or shape.  Self-adhesive bindis are available and come in many colors, designs, materials, and sizes.   Source: Wikipedia                                  Click on this: The Red Dot