(HealthDay News) -- Hair dye contains chemicals that can be absorbed by the skin, so you should be careful when coloring your hair.

The American Cancer Society advises:

  • Follow packaging instructions, especially portions containing warnings and precautions.
  • Before dyeing hair, do a patch test to check for a skin reaction. Do this even if you have used the same dye before.
  • Wear gloves when applying dye.
  • Never mix different dyes.
  • Leave the dye on only for the recommended amount of time. Rinse thoroughly.
  • Never dye eyebrows or eyelashes.