Androgenetic Alopecia, commonly referred to as male pattern baldness (MPB), accounts for 95% of hair loss. There is hair loss among females too. Some of the most common factors contributing to hair loss are listed below:
Smoking
Alcohol intake
Stress
Genetic : Hereditary occurring in the family
Mechanical damage: Traction alopecia owing to regular use of wigs, hair weaving, hair bonding, etc.
Systematic Medical Problems: Hypothyroidism, high fever and pregnancy
Medications : Anti cancer drugs and radiotherapy medication
Alopecia Areta: Disorder in immunity causing patchy hair loss
Telogen Efflueum: Diffuse loss of long hairs with roots
Dermatological: Skin disease affecting scalp
Diet: Deficiency of vitamin A, E, and B or iron deficiency
Chemical damage: Use of bleaches, dyes, hard water and low quality cosmetic applications can result in hair loss too.
Idiopathic : No definite cause