In recent years, hair coloring has become a fashion, close to the New Year's Pass, and because the epidemic has been sealed at home for more than 1 month, the barber shop in Xi'an is full of homes, cutting a hair can not be booked, this is not, a few joys and a few sorrows, some people with sensitive skin dye hair or to be cautious, today to talk to you about the hair dye caused by contact dermatitis.
What is contact dermatitis?
The so-called contact dermatitis, as the name suggests, is when the skin or mucous membranes are exposed to certain exogenous substances single or multiple times, an allergic reactive inflammation appears in the contact site or the whole body, because most hair dyes contain an ingredient called p-phenylenediamine, which is a major substance that causes allergies, of course, whether it will cause allergies, which has a very large relationship with the content of phenylenediamine in the hair dye and the individual's physique.
The symptoms of contact dermatitis are diverse, including erythema, swelling, papules, blisters, and even bullae, which are often accompanied by itching, and are divided into acute, subacute, and chronic contact dermatitis according to the length of the disease.
How can I prevent contact dermatitis caused by hair coloring?
If you are allergic and use an unqualified hair dye with a relatively high content of p-phenylenediamine, the probability of allergies at this time is very large. How can I prevent contact dermatitis caused by hair coloring?
First of all, try not to dye hair, if you have to dye hair, try to choose a qualified hair dye with a relatively low content of phenylenediamine; secondly, do a patch test before dyeing hair, the conventional practice is to apply a coin size area of hair dye cream in the place where the skin behind our ears is thinner, observe for 48-72 hours, see if the local skin has a reaction, if there is no response, you can use it with confidence.
Here, we should also remind everyone in particular that if you use the same hair dye for a long time, the first use does not cause allergies, nor does it mean that the second use must not occur allergies, so before each hair coloring, you must do a patch test. If you accidentally cause allergies due to hair coloring, you must repeatedly wash the scalp with warm water at this time to reduce the absorption of allergic substances and avoid scratching and causing infection. If the symptoms are severe, be sure to go to the hospital for medical treatment.
How is contact dermatitis treated?
At present, the clinical treatment of contact dermatitis is mainly based on external drugs, the purpose is to let the drug directly act on the skin of the affected area, relieve discomfort symptoms in a short period of time, as far as the specific drug is concerned, the doctor will choose different drugs according to the severity of the disease, and for patients with poor or serious conditions of external drugs, it will also be recommended to use internal drugs.
Commonly used topical drugs are calamine lotion, zinc oxide oil, glucocorticoids, antibiotics, etc. In the initial acute phase of the disease, calamine lotion is selected when there is no exudate, zinc oxide oil is used when there is a small amount of exudate; topical glucocorticoids are selected in the subacute phase, and when there is infection, topical antibiotics are also used to prevent further aggravation of infection.
Oral drugs mainly include antihistamines, antibiotics, glucocorticoids, immunosuppressants, etc., can quickly reduce symptoms, control inflammatory infections, in addition, if necessary, you can also take some vitamin C, calcium, etc. to accelerate recovery, it needs to be clear that due to individual differences, the medication does not exist absolutely the best, fastest, most effective, all drugs should be used under the guidance of doctors, especially glucocorticoids and antibiotic drugs with large side effects, do not buy blind use by yourself.