How to determine cosmetic allergy

Women attach great importance to their faces and will use many skin care products to take care of themselves, slowing down their aging as much as possible and effectively alleviating the formation of wrinkles. In fact, when girls buy cosmetics and skin care products, they must first test whether they are allergic to the products, because some girls have sensitive faces and some cosmetics are not suitable for them. So how to judge cosmetic allergies?

Some skin care products may not cause obvious allergic symptoms after use, but the skin may feel slightly itchy. Some people may think that it is due to the weather or poor moisturizing effect. In fact, it may also be that the skin is allergic to the use of this skin care product.

2. Peeling, dryness, and scaling

When our face experiences peeling, dryness and flaking, sometimes these are early signs of facial skin allergies. If possible, it is recommended to temporarily stop using skin care products for a period of time to observe whether the allergic symptoms are caused by excessive use of cosmetics.

3. Is there redness?

Some products may cause slight redness in the early stages of use, but this will be fine as the skin adapts. In fact, we should pay attention to whether allergies occur if redness occurs in the early stage but the skin symptoms become more and more obvious after a few days of use.

One of the common symptoms of skin care product allergy is acne. The suitability of skin care products varies from person to person. Some people may be allergic to the same product while others may not. Especially when red acne appears and is accompanied by itching, you must be alert that you may be allergic to a certain skin care product.

5. Can cosmetic allergies be tested? How to test it?

In fact, the method of skin allergy test for cosmetics is very simple. First, soak a piece of gauze with distilled water or saline and wring it until it is half dry.

Fold it into 4 layers of about 1 square centimeter in size, apply cosmetics on one side of the gauze, and then apply it on the extensor side of the forearm or the normal skin on the back, then cover it with 1.5 square centimeters of airtight cellophane or plastic film and fix it with tape.

If simple erythema and itching appear, it is weakly positive; if redness, swelling and papules appear, it is moderately positive; if significant redness, swelling, papules and blisters appear, it is strongly positive; if significant blisters or even necrosis appear, it is extremely strongly positive. If a positive reaction occurs, in addition to timely cleaning and treatment, it is also recommended that the cosmetics must never be used.