Side Effects Of Hair Dyeing
Side Effects Of Hair Dying!Hair dyeing began to dye white hair black, but in recent years, it has changed into a cosmetic act by showing various hair colors to express various personalities and freedoms. As the side effects of henna dyes known as vegetable ingredients were reported in the press at the end of last year, dermatologists are increasing the number of people who come to the dermatology department to address dark skin coloration that occurs on the entire face or along the hair line.
Themost common side effect of dyes is allergic contact dermatitis. Paraphenylenediamine (PPD) used in dyes is a typical cause of allergic contact dermatitis. During hair dyeing, 1% of PPD passes through the skin, and 20% of them combine with specific amino acids to form haptens, causing sensitization to dermatitis. Will be able to kill. Henna dyeing has attracted attention because it produces a natural hair color without causing allergic contact dermatitis.
The dyeing process is a process in which the hair is changed to a new color by causing a dye oxidation reaction on the bleached hair at the same time as the bleaching reaction. The dye is composed of the hair dye, which is the first agent, and the oxidizer, which is the second agent. After mixing the first agent and the second agent and applying it to the hair, dyeing takes place after about 30 minutes. The first agent is composed of a dye intermediate and a dye modifier capable of changing the hair color by reacting with it. The most commonly used dye intermediate is brown hair when used alone as PPD. Do it.
Henna is made from the leaves of 'Lawsonia uremis', and the main pigment component is the naphthoquinone-based lawson, which is often used for tattooing and dyeing. Henna dyeing is a dyeing method that is often used when there is an allergy to dye because it does not cause allergic reactions compared to conventional dyes. However, when henna is dyed, several substances are added to shorten the dyeing time and give a natural color. Among them, components such as PPD added may cause contact dermatitis. Most of the black henna contains PPD, which can also cause allergic contact dermatitis.
The recently reported cases are not allergic contact dermatitis, but brown pigmentation on the face and neck. It is presumed that henna staining is the cause as the occurrence of henna staining is noted as the number of patients with pigmented contact dermatitis increases rapidly. The pigmented contact dermatitis is caused by repeated exposure to a small amount of allergen, and is a result of weak contact dermatitis, which causes changes in pigmentation on the face and neck. In addition to henna dyeing, cosmetics such as aftershave lotion, fragrances such as bleach, soap, shampoo and perfume, and dyes used in clothes and dyes have been reported.
Repeated staining may irritate the skin and cause skin pigmentation. If blistering occurs after staining and the face is swollen, it is necessary to suspect contact dermatitis and seek a dermatologist for proper treatment. On the other hand, if the pigmentation on the face and neck is black and stained repeatedly over a long period of time, it is better to stop the dyeing immediately and seek a dermatologist to see if it is a skin change caused by pigment contact dermatitis.
The dyeing process is a process in which the hair is changed to a new color by causing a dye oxidation reaction on the bleached hair at the same time as the bleaching reaction. The dye is composed of the hair dye, which is the first agent, and the oxidizer, which is the second agent. After mixing the first agent and the second agent and applying it to the hair, dyeing takes place after about 30 minutes. The first agent is composed of a dye intermediate and a dye modifier capable of changing the hair color by reacting with it. The most commonly used dye intermediate is brown hair when used alone as PPD. Do it.
Henna is made from the leaves of 'Lawsonia uremis', and the main pigment component is the naphthoquinone-based lawson, which is often used for tattooing and dyeing. Henna dyeing is a dyeing method that is often used when there is an allergy to dye because it does not cause allergic reactions compared to conventional dyes. However, when henna is dyed, several substances are added to shorten the dyeing time and give a natural color. Among them, components such as PPD added may cause contact dermatitis. Most of the black henna contains PPD, which can also cause allergic contact dermatitis.
The recently reported cases are not allergic contact dermatitis, but brown pigmentation on the face and neck. It is presumed that henna staining is the cause as the occurrence of henna staining is noted as the number of patients with pigmented contact dermatitis increases rapidly. The pigmented contact dermatitis is caused by repeated exposure to a small amount of allergen, and is a result of weak contact dermatitis, which causes changes in pigmentation on the face and neck. In addition to henna dyeing, cosmetics such as aftershave lotion, fragrances such as bleach, soap, shampoo and perfume, and dyes used in clothes and dyes have been reported.
Repeated staining may irritate the skin and cause skin pigmentation. If blistering occurs after staining and the face is swollen, it is necessary to suspect contact dermatitis and seek a dermatologist for proper treatment. On the other hand, if the pigmentation on the face and neck is black and stained repeatedly over a long period of time, it is better to stop the dyeing immediately and seek a dermatologist to see if it is a skin change caused by pigment contact dermatitis.
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