Graying of hair can be seen as part of Aging process
Starts at an age >20 in whites and at an age > 30 in black
Poliosis is the presence of grey hair in circumscribed pattern
What are the causes of premature graying of hair?
- Megalobastic anemia
- Diabetes mellitus
- Hyperthyroidism
- Dystrophia myotonica
- Rare syndromes like Werners syndrome ,Vogt Koyanagi syndrome, Waardenbure syndrome, Chediak-Higashi syndrome.
in protein energy malnutrition
