TEWL

TEWL, Transepidermal water loss, which is the process of passive evaporation of water through the epidermis.

What does the term "TEWL" mean?

Transepidermal water loss, which is the process of passive evaporation of water through the epidermis. In cosmetology and trichology, the meaning of this term always depends on the context: location, symptoms, duration of the problem, products used, and individual tolerance.

What is its practical significance?

Understanding this concept helps to better comprehend cosmetic product descriptions, specialist recommendations, and the mechanisms occurring in the skin or hair. However, it does not mean that identifying a single element independently is sufficient for choosing a therapy.

What should you pay attention to?

It is not worth evaluating a product, ingredient, or procedure solely based on the popularity of the term. Formulation, concentration, method of use, contraindications, and skin condition are important. Introduce changes one at a time and observe the reaction.

When is a consultation needed?

If the problem is severe, recurring, causes pain, intense itching, inflammation, sudden hair loss, or a noticeable change in skin appearance, consult a dermatologist. A cosmetologist or trichologist can support care and refer you to the appropriate specialist.

This entry was prepared by Justyna Broda, cosmetologist and trichologist. The material is for educational purposes and does not replace a diagnosis.