Advice: Do a skin patch test 24 hours before first use. These are the safest options. Here, the dye is painted on the length of the strand of hair, but not the scalp. It is not absorbed by the skin.

It is very crucial to know about the side effects before applying henna to hair. Allergic Reactions: The application of henna can cause allergic reactions. Though it is considered safe ...

During hair bleaching, chemical substances carefully remove color pigments. Colorist Lauren Paglionko says that when lightening powder is applied to the hair, the "scales" open up.