Male and female pattern baldness accounts for 95 % of hair loss in people. Hair loss attributed to genetic factors; can often be "patchy" with particular severity in one or two areas of the head
Alopecia
Considered to be an auto-immune disease of the hair. It can range from mild patchy hair loss on the scalp, to total loss of hair on scalp to total loss of hair on scalp and body hair. There are no cures for alopecia, only treatments.
Drugs and surgery
Through drug side-effects, brain surgery, cancer treatments, cosmetic surgery etc.
Trichotillomania
Damage or loss caused by compulsive hair-pulling and twisting, with increased severity during times of emotional stress
Accidental damage
Including burns, malicious assault, trauma
Chemical damage
Often caused by home coloring, perms or over-use of chemicals. Can also be caused by the use of relaxers in Afro-Caribbean hair.