It is called a "bindi."
sindhoor sindhoor
They can use anything from a henna tattoo, to stickers, to a type of glue to keep it on.
It is a symbol of their faith
Women in India wear a red dot to represent a third eye which stands for knowledge, because of the goddess Shiva know as the destroyer.
To get an Indian man of the bus you would have to press his red dot on his forehead. LOL!
Indian men & women of the Hindu religion get a smudge of orange dust on their foreheads as a blessing. It is generally located where the "third eye" is.
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Only married women where it but it is not necessary that all Indian women have to wear it also they wear a red line on the head to show they are married but yet again it is not necessary.
The sindur means that she is married. It's a sign of her husband.
If you mean the sindoor on women's foreheads, no they are not. It is a washable, red powder.
It is a form of Tilak which is symbol of auspeciousness and the yellow line with red dot symbolize to give respect to lord Vishnu