Patch Test: Test for allergies

Hanoi French Hospital in Hanoi has just launched Patch Test (Test for Allergic Skin Pressure), to help patients find the cause of dermatitis and skin allergies.

In front of that fact, Hanoi French Vietnamese Hospital offers a new package service: Patch Test (Test for Allergic Skin Pressure), to help customers find the cause of dermatitis and skin allergies.

In particular, help patients with atopic dermatitis such as eczema, pruritus, neurodermatitis . improve the quality of life.

Currently, Hanoi French Hospital in Hanoi is implementing this type of examination, with the service package including: One visit and consultation with dermatologists; Test for allergens and two re-examination visits, counseling with dermatologists

After making Patch Test, customers will be provided with a list of allergens to prevent allergies (allergic contact dermatitis), and doctor's advice to help prevent recurrence of many skin diseases. annoying.

What is a Patch Test?

Test of causes of dermatitis with Patch Tets (Photo: bio-diagnostics) Patch Tets are tests that look for causes of inflammation caused by exposed skin.

This test uses built-in allergens on a healthy area, one for each of the allergens. After 48 hours or 96 hours, if there are signs of allergy when exposed to any allergy, it is the cause.

Allergens are substances that can cause skin irritation. These substances are found in drugs, in cosmetic chemistry and in industries such as tanning, rubber cigarettes and other industries.

Who made this test?

Most people do this test, because when we know that we are often allergic to any allergens, we will have more opportunities to protect our own skin.

In particular, people with allergies who have no known cause, patients with atopic dermatitis (eczema, pruritus, neurodermatitis .); those who are often exposed to cosmetic products, especially women use a lot of cosmetics and jewelry; People working in the chemical industry should do Patch Tets.

Skin - body protection system

The skin protects the body from harmful environmental factors, with two fences being the corneum and the basement membrane. If the stratum corneum is damaged, it increases the absorption capacity through the skin, increasing the loss of water through the epidermis. Chemicals will easily penetrate through the skin, the protective and recovery function of the skin will gradually be exhausted. The inevitable result is inflamed skin.

Contact dermatitis depends on factors such as exposure concentration, how we are exposed, contact time, contact area, age, individual susceptibility, skin condition, strain. races and other factors such as hot weather, humidity, cold, increased sweating . Usually black skin is less sensitive than white. Dry skin, damaged skin will increase absorption of allergens through the skin. Girls (12-16 years old) or sensitive to nickel in jewelry. Young people have contact dermatitis due to the use of cosmetics, occupational environment, while older people often use drugs.

What is contact dermatitis?

Urticaria skin (Photo: VNN)

Contact dermatitis is an inflammatory skin reaction due to interaction between the skin and the external agent. It is a reaction of the body to strange allergens. Based on the pathogenicity mechanism, people divide contact dermatitis into two types: Allergies and irritation.

Irritable contact dermatitis (an inflammatory reaction caused by exposure to irritants) is often caused by alkaline substances, acids and by many toxic insects. They cause inflammation of the skin through the body's immune response. This type of dermatitis usually accounts for 80%.

Allergic dermatitis occurs only in some people with allergic sites. The allergens cause disease through the body's immune response. This is a type of slow allergy - cell-mediated allergy. Allergic contact dermatitis usually accounts for 20%.

Expression of contact dermatitis

When skin comes in contact with irritants, the skin will appear phenomena such as stinging, burning, dry, tight, burning skin. More severe is red skin, edema, then blisters, burns water, may be slippery, ulcerated. Many women must be exposed to irritants such as dishwashing liquid, soap . when doing skin chores often cracked, red skin, peel off, hand dermatitis.

In the case of allergic contact dermatitis, it does not cause symptoms at first.

Symptoms appear soonest after appearing with about 48-72 hours. Allergic contact dermatitis occurs in people who have been exposed to previous allergens that may be weeks, months, or even years. At first, the patient will feel itchy, then the skin turns red, edema. On the red leather background, there were small blisters like pins. Blisters are broken, secreted, easy to infect bacteria, forming pustules. Decreasing illness during holidays or weekends is often due to occupation, but if relapse at the end of the week is often related to environmental habits or allergens.