People often regard it as a traditional natural hair dye and conditioner practice ... about the side effects before applying henna to hair. Allergic Reactions: The application of henna can ...

Some henna tattoos could cause a lifelong allergy to a common chemical found in dyes, warn scientists. The German researchers warn that the trendy Some henna tattoos could cause a lifelong allergy ...

But before I could reach for bleach and pink dye (I wanted pink hair like Lady Gaga), my mom suggested ... increased sensitivity, or even more severe reactions like blistering.” What are the risks of ...

Hair dyes contain chemicals that in rare cases can cause severe, even life-threatening, allergic reactions. Hair dye manufacturers say they are not intended for anyone under the age of 16.