Seeing that hair is tough and healthy, it has good toughness and elasticity. When it is pulled under wet conditions, it can increase its length by 30%. After drying, it can be restored to its original length. Even if the hair is twisted, its good elasticity can still make the hair completely return to its original state without damage. Under normal circumstances, a hair can lift the weight of about100g, but the toughness of the injured hair will be greatly reduced, and the original elasticity will gradually decrease, resulting in hair breakage and bifurcation.
Healthy and lubricated hair will not be greasy and will not easily generate static electricity. Damaged hair will lose water seriously when it is dry, and it is easy to generate static electricity. Even the hair will fly, and after being soaked, it will absorb water excessively, exceeding its own weight by at least 200 times, while healthy hair is about 15 times that of its own hair after being soaked.
Healthy and soft hair is easy to comb, but not suitable for knotting. Soft but not astringent, easy to shape. However, badly damaged hair is difficult to set and often ends in knots.
Look at that shiny healthy hair. It is shiny and watery, nutritious and full of vitality, not dull, withered and brown. If the hair is eroded, the fur skin is damaged and cracked, resulting in unsmooth hair shaft, and the hair is easily stained with dust, which affects the luster.
Look at the thickness of healthy hair, the thickness is moderate, not too thick and not too thin, especially pay attention to the symmetry of hair roots. When you get older, your hair becomes thinner and thicker, and you are more likely to suffer from seborrheic alopecia.
Hair is not greasy or dry, shiny and soft, sebum and moisture are balanced, density and texture are moderate, moist, smooth and elastic, and hair friends with good hair quality are the happiest. However, hair friends with good hair quality should not worry, pay attention to the maintenance of their hair.
When we know this common sense, when you find that your hair has too much dandruff, hair oil and scalp itching, it is actually a sub-health state of scalp hair, close to baldness and white hair.