Hair coloring by lay people may not be sufficiently accurate. Hair that has been damaged by excessive exposure to chemicals is considered "over-processed". This results in dry, rough and fragile hair. In extreme cases, the hair can be so damaged that it breaks off entirely. The main cases of hair breakage are: Lack of moisture and oils, poor diet, stress, over processing or illness. Skin and fingernails are made of a similar type of keratinized protein as hair. That means that drips, slips and extra hair tint around the hairline can result in patches of discolored skin. This is more common with
Afro-textured hair (especially Black women) "had many Eurocentric features, including hairstyles." However, during the movement, the Black community endeavoured to define their own ideals and beauty standards, and hair became a central icon which was "promoted as a way of challenging mainstream standards regarding hair." At this time, an African-American person's "ability to conform to mainstream standards of beauty [was] tied to being successful." Thus, rejecting straightened hair symbolized a deeper act of rejecting the belief that straightening hair and other forms of grooming which were deemed 'socially acceptable' were the only means of looking presentable and attaining success in society. The