cosmetic hair damage
Introduction
Introduction Cosmetic hair damage: hair damage caused by the application of cosmetics. It is clinically characterized by changes in hair quality and rupture, bifurcation and discoloration, texture becoming brittle, tarnishing, etc., and hair loss of varying degrees can occur.
Cause
Cause
The mechanism of cosmetic damage to hair is mostly physical and chemical damage, which may be direct damage to cosmetics, or it may be the destruction of the normal structure and function of the hair itself and hair follicles by certain ingredients in cosmetics.
Examine
an examination
Related inspection
Trace element poisoning test
Diagnostic criteria:
1. Cosmetic hair damage must have a history of contact with hair cosmetics, such as shampoo hair conditioner, hair cream, hair gel, hair dye, hair spray, eyebrow pencil, eyebrow gel, mascara and so on.
2. After using the above cosmetics, the hair is discolored, brittle, bifurcated, broken, shed, tarnished, deformed and the like.
3. After using the hair cosmetics, you can gradually return to normal.
4. Analyze the hair cosmetics and damaged hair if necessary to help determine the cause.
Diagnosis
Differential diagnosis
Hair damage caused by other causes, such as head lice, longitudinal nodules, tubular hair, alopecia areata, male pattern baldness, etc., should be excluded. Normal healthy hair contains a small amount of water to moisturize the hair and make it dry and dry. The moisture in it rarely escapes from the fur, which is due to the dense outer skin of the fur, which acts as a waterproof layer. However, when subjected to factors such as chemical perm, hot air blowing, friction, etc., the hair can be lifted, detached, or even completely ablated, and the protective effect of the hairy skin is lost. In this way, when the hair is dry, the moisture of the hair is easily lost, and when the hair is shampooed, the moisture or the hair dye is easily entered into the fur, and the hair is swollen. Repeated swelling and dryness eventually lead to dry, thinned hair, weak and fragile hair loss, and hair loss. Dry hair, also known as dry hair, dry hair and so on. It is dull due to lack of moisture, even dry coke, easy to fall, often accompanied by dry skin.
