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Skin tests

Product patch test Epicutant test (patch test) Dermatoscopy Woods lamp Fitzpatrick Sckale

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Product patch test

Patch tests are an easy way to help predict if you will have a negative initial reaction to a new product. It is recommended to perform a patch test before incorporating a new product into your routine

We have outlined a general method for conducting your own patch test based on the type of product.

Leave-On Products (Serums, Moisturizers, Oils, Acids, Antioxidants, Makeup, Peptides, Retinoids, Vitamin C, Suncare, etc.):

  • Apply a small amount of the product onto a clean area of skin on the upper forearm
  • Keep the area dry
  • After 24 hours rinse the area
  • If any redness, burning, itching, blistering or irritation is observed at any time throughout the test, do not use the product

Rinse-Off Products (Cleaners, Shampoos, Conditioners, Body Washes, Grooming Products, etc.)

  • Apply a small amount of the product onto a clean area of skin on the upper forearm
  • Keep the area dry
  • After 24 hours rinse the area
  • If any redness, burning, itching, blistering or irritation is observed at any time throughout the test, do not use the product

Masks and Peeling Solutions (AHA Peeling, BHA Peeling, etc.)

  • Apply a small amount of the product onto a clean area of skin on the upper forearm
  • Leave-on for the specified length of time stated in the directions of use of the product
  • Rinse off when the specified time has passed
  • If any redness, burning, itching, blistering or irritation is observed within 24 hours of the patch test, do not use the product

Salicylic Acid:

  • Apply product to a small area once a day for three days to test if you are sensitive to this product
  • If dryness or peeling occurs reduce application to once a day or every other day
  • If you develop severe irritation, hives, swelling of eyes and mouth, blistering, or difficulty breathing, rinse off, cease use and consult a physician right away

Please note that the patch test is only for determining initial irritation reactions to products and does not guarantee similar results when applied to other areas of the body (including the face) or after continuous use. It does not account for underlying conditions and should not be used for the diagnosis of hypersensitivity or allergic contact dermatitis. If you are concerned about starting a new product, please consult a dermatologist prior to use

 

Patch test of skincare products

 

Epicutant test (patch test)

Epicutant test (patch test) is used for suspected contact allergy.

During the test, tape strips with a number of substances are applied to the back. There is a basic series of about 30 substances that are common to be allergic to. The strips remain for 48 hours, then read off after 3 and 7 days respectively. One then looks for papules, vesicles and blisters. In connection with reading, a relevance assessment of findings is made.

It is inappropriate to make the test unnecessary for young people.

Contraindications:

  • Pregnancy
  • Ongoing cortisone treatment
  • Sun exposure of the spine within 14 days before testing
  • Active dermatosis on the back

 

Dermatoscopy

Dermatoscopy is a diagnostic performed with the Dermatoscope - a magnifying glass with light source and lenses. Reflection from the skin surface, pigments and blood vessels is visualized in a pattern and color which allows a skin analysis.

Dermatoscopy is best evaluated to identify melanoma. A method that is extremely effective and often referred to as Chaos and Clues.If the lesion is asymmetric (chaotic) in pattern or specific color, one should suspect melanoma.

Dermatological Colors:

Yellow: Keratin
Black: Stratum corneum melanin, the superficial layers of the epidermis or pervasive throughout the epidermis with or without dermal involvement
Brown: Melanin under the startum corneum, especially in the dermoepithelial transition and in the papillary dermis
White: Lack of pigment (melanin): Atrophy / fibrosis / collagen
Gray: Free melanin or melananophages in the papillary dermis
Red: Blood
Blue: Melanin in deep dermis.

Dermatoscope for skin test

 

Woods lamp

Woods lamp is used to diagnose skin diseases, determine the skin type and the presence of inflammatory skin infections. Based on these data, skin care and cosmetics are provided. Woods lamp also highlights hypopigmenting lots. It can help chart the extent of vitiligo. Woods lamp is particularly suitable with skin phototype I and II (according to Fitzpatrick Skala) where vitiligo propagation can be more difficult to determine in daylight.

The study should be carried out in a completely darkened room without other light sources.

Various microbiological agents can provide different fluorescence patterns with different colors.

Woods lamp for skin test

Fitzpatrick sckale

Do you know which skin type you have according to Fitzpatrick Skala? Test yourself!

Knowing your skin type is important as it affects the choice of skin care products, sunscreen, and ways to remove body hair.

There are many classifications of skin types, but the most common is the Fitzpatrick classification. It builds on how the skin reacts to exposure to sunlight. The Fitzpatrick scale has six skin types.

The Fitzpatrick scale is still a recognized tool for dermatological studies of human skin pigmentation.

 

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