If the sebum containing more unsaturated fatty acid and thin, it will lead to greasy hair and scalp. It is also called the secretion type. Oily scalp and oily and sticky dandruff. |
The sebum containing more saturated fatty acid and sticky.
It will lead to congested follicle and the hair becomes dry and fragile. It is also called the block type. Flaky dandruff, serious itchiness, dry hair. |