What symptom does hair dye poison have

summary

Now people all know that hairstyle is very important for a person, so hair dyeing has become the favorite of modern people. However, if the hair dye is not used well, it will cause scalp allergy. Don't dye your hair more than twice a year. Use less permanent hair dye... How much do you know about hair dye and hair dyeing?

What symptom does hair dye poison have

First, we need to conduct a correlation test before hair dyeing. Whether it's self-service hair dyeing with open shelf brand or asking someone to dye hair in the salon, it's necessary to conduct a skin test 3 hours before hair dyeing. The method is to drop two kinds of dye a and B on the same point on the inside of the wrist, waiting for natural dryness. If there is redness and itching in this process, the product can not be used continuously.

Second: don't dye your hair if you have scratches on your scalp. Remember not to wash your hair before dyeing. First, the grease excreted by your scalp can protect your skin. Second, it can prevent careless scratches in the process of shampoo. If the scalp presents trauma, and then touch the hair dye, it will cause inflammation. In addition, if you want to perm and dye your hair one step at a time, you have to notice that the perm will cause certain damage to the enemy's hair. Therefore, if you want to continue to dye your hair, you need to wait another two months or so.

Third: don't dye your hair again in three months. If you have dyed your hair before in three months, you'd better not dye it again. Because the hair dye is rich in decolorizer, the hair scales of the enemy's hair are damaged, and the damaged hair scales will become weak and easy to break. If the hair is dyed repeatedly within three months, the damaged hair scales will be damaged again without recovery. As time goes on, the health of the hair is worrying.

matters needing attention

Pregnant women are not suitable to touch the product of chemical dye, because it is bad for the fetus. During the holidays, women's internal excretion and other aspects will change. In order to prevent doubt, hair dyeing should also be prevented. In addition, patients with skin diseases are not suitable for hair dyeing.