Because the hair dye contains chemicals harmful to human body, if it is used for a long time, it will not only easily cause skin allergies, but also cause cancer to a certain extent. So don't dye your hair frequently. It is necessary to give the scalp sufficient time to detoxify and repair the damage. It is best not to dye your hair at intervals of less than three months. Extended data:
Nursing after dyeing:
1, conditioner. After dyeing hair, using conditioner can seal the scales of hair epidermis, making hair smooth and easy to comb, healthy and supple.
2, hair care film. Hair care film can deeply repair hair. Try it after dyeing, but it can be used once a week. The method is to fully massage the hair with a hair care film and put on a shower cap for hot steaming. In addition, when using the hair care film, you can drop a few drops of hair care oil, which can better nourish your hair.
3, hair care oil. Hair care oil, that is, essence, will be more effective if it is used before or together with hair care film. The method is to gently massage the hair with hair care oil when the hair is semi-dry or completely dry.
The following contents are for reference: Phoenix Net-Will hair dyeing cause cancer? How often is it appropriate to dye your hair? Let's look at three suggestions.