Dry hair looks dull, feels dry, tangles easily and is difficult to comb or brush, particularly when it is wet. It is often quite thick at the roots but thinner and sometimes split at the ends. Dry hair can be identified quickly by its dull, lack-lustre appearance. This is often the result of excessive perming or coloring. However sometimes it can be because the scalp has fewer oil glands than normal.
Dry hair can be caused by lots of things such as excessive shampooing, hair straighteners, misuse of colours or perms, weather/sun damage. Each of these factors depletes the moisture content of dry hair, so that is losses its elasticity, bounce and suppleness. Dryness can also be the result of a sebum deficiency on the hair's surface, caused by a decrease in or absence of sebaceous gland secretions.