How about dyeing your hair at night? When is the best time to dye it?

You can dye your hair in the morning or at noon. The color of freshly dyed hair is not so fixed, it is easy to fade, so dye it somewhere else. If you dye your hair at night, you may get into bed, and sleeping will make your hair messy.

Pay attention to dyeing your hair:

First, the fewer times you dye your hair, the better, no more than twice a year, as long as you dye the newly grown place.

Second, use less permanent hair dye. Consumers who use permanent black hair dyes should consider switching to light hair dyes, because the darker the color, the more toxic the hair dyes are. Generally speaking, it is a temporary hair dye that fades after washing your hair three or four days after dyeing, a semi-permanent hair dye that fades after 1~2 weeks after dyeing, and a permanent hair dye that basically does not fade after dyeing for more than 2 weeks. The former two are less toxic, while the latter is more toxic.

Third, don't dye your hair with different hair dyes at the same time. Chemical reactions may occur between hair dyes, producing toxic substances.

Fourth, it is best to dye your hair near the scalp 1 cm.

5. People with boils, skin ulcers and allergies to hair dyeing should not dye their hair. If you insist on dyeing your hair, you must do an allergy test and rub the hair dye on the skin behind your ear. If there is no abnormal reaction within two days, you can dye your hair. People with high blood pressure and heart disease, as well as people during pregnancy and childbirth, should not dye their hair.

6. Rub some vaseline on the scalp before dyeing your hair, and it will be easy to wash off with the liquid medicine.

Seven, pay attention to remind the hair dye technician, don't use metal utensils when collecting liquid medicine.

Eight, after dyeing your hair, wash it several times, and don't let the hair dye remain on your hair; Be careful not to scratch your scalp with your fingers when washing your hair to avoid poisoning.

Nine, it is best to buy qualified low-toxic products that have passed the national safety assessment.

X. Regular physical examination.