Inflammation caused by hair dyeing is mostly contact dermatitis, which is mainly an inflammatory reaction caused by an individual’s physical allergy to the chemicals in the hair dye. People with allergies may experience rashes, itching, redness, and scaling on the scalp and neck soon after dyeing their hair. In severe cases, there may even be blisters. At this time, the patient may think of washing their hair a few more times. Symptoms will subside immediately, and since an allergic reaction has occurred, only medication can relieve symptoms.

Hair Dye Allergies

The culprit of allergic reactions in hair dyeing is dyes. Among them, para-dyes in permanent hair dyes are the most common. Semi-permanent hair dyes can also occur, but the chance is low. Other metallic, plant-based, and temporary hair dyes are more likely to cause allergic reactions. Rare. Among para dyes, para diamine is the most likely to cause allergies. Although para dyes with new structural formulas have been developed and are slightly less allergic, 4 to 5% of people will still be allergic. For this reason, it is recommended that if you have ever been allergic to hair dyes, it is best not to try permanent and semi-permanent hair dyes. Instead, it is safer to use metallic, plant-based, or temporary hair dyes.

Para dyes dominate hair dyes

It has been reported that they can cause chromosomal changes in animals, but there is no clear evidence in humans. The amount of para dyes required to cause cancer is quite high. If you are like the average person, Dyeing your hair only once every one to two months is considered safe; in the past, some people reported that persistent hair dyes caused urinary tract tumors and lymphatic system lesions, and some people were left with white spots after contact allergies. Some even accidentally took orally administered hair dye. Hair dyes can cause systemic poisoning, respiratory distress, acute renal failure, rhabdomyolysis, and other poisoning phenomena. Therefore, special attention should be paid not to place hair dyes within easy reach of children to avoid accidental ingestion; in addition, metallic dyes The main component of lead is lead.

If used too much and absorbed too much, it will cause lead poisoning. Based on the above, it can be seen that the frequency of use of hair dye should be by the instructions on the package, and it must not be used too frequently.