Test for dermatitis with a patch test

Test for dermatitis with a patch test

Contact dermatitis is a skin disease cause by contact with substances outside the body. The symptoms of dermatitis include itching, rashes, swelling, redness, and possibly lymphatic drainage. Sometimes, there may be other symptoms of dermatitis, such as dark spots on the skin. The symptoms that appear may be any, depending on the stage of the disease. The cause of the disease is mostly from substances from outside the body that come into contact with the skin, such as nickel metal, cosmetic compounds, preservatives, fragrances, elastic, etc.

Recommendations for those who need to undergo skin prick testing

Allergy skin testing is a test to find the cause of dermatitis in patients. Who suspect that the dermatitis may be cause by contact with allergens such as nickel, black substance (Paraphenylenediamine) in hair dye, substances use in the rubber production process, etc. In cases where the patient is acutely allergic, it will cause hives, red rashes, itching in the area where the allergen comes into contact. In some cases, severe symptoms may appear as hives all over the body, including severe symptoms such as facial swelling or difficulty breathing.

Skin allergy testing can done in 2 ways 

1. Patch testing is a test method. Which the allergen is applied to a non-rash-free area of ​​the skin, usually on the back or upper arm, and the test results are read 48 hours and 96 hours after application.
2. Prick test is a test for patients who ทางเข้า UFABET สำหรับสมาชิกใหม่ สมัครวันนี้ รับโบนัสฟรี have symptoms of urticaria from contact with allergens. The test results can known within 20-30 minutes.
   The choice of skin test depends on the history and characteristics of each patient’s skin rash. The doctor will consider the history and physical examination.

Who should get a patch test?

Patch testing is a method of testing for substances that may cause contact allergies on the skin, especially for people who have allergic rashes or chronic skin diseases. People who should have a patch test include:

1. People who have recurrent or chronic allergic contact dermatitis, have a history of red, itchy rashes, blisters, or recurring allergic reactions to areas that have come into contact with chemicals, such as cleaners, perfumes, metals, or topical medications.
2. People who have a history of allergic reactions to cosmetics or skin care products, such as rashes after using skin care creams, perfumes, shampoos, or makeup products.
3. People who work in occupations that regularly come into contact with chemicals, such as doctors, nurses, hairdressers, painters, jewelers, or those who work with chemicals, metals, oil, or rubber.
4. People who suspect they are allergic to metals or medical materials, such as an allergy to jewelry, metals from medical devices (e.g. dental implants or bone stents)
5. Patients with dermatitis that is unresponsive to treatment, especially if the symptoms of the skin condition (such as eczema or dermatitis) do not improve despite appropriate treatment.
6. Those who want to know the allergens to avoid them in the future, such as those who have an allergic reaction and want to find out the exact cause.
7. People who have problems using everyday products such as detergents, household cleaning products, or other materials that come into contact with them in everyday life.