Alopecia

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INTRODUCTION

Hair loss is a normal phenomenon. Hair grows from the hair follicle at an average rate of a 1/2 inch per month. Usual life span of each hair is 2 to 6 years before it falls out and new hair starts growing in its place. At any one time, about 85% of the hair is growing and 15% is resting. But hair loss of more than 50 – 100 hair in a day is usually considered as a signal of impending hair loss or ‘Alopecia’. Although hair loss may not be physically disabling, it can be emotionally very disturbing.

alopecia

What is Alopecia

Alopecia is defined as a partial or complete loss of hair. It may be noticed by a person as hair entangled in the comb, thinning of the hair or small patches of hair loss.

Common causes of hair loss may include nutritional deficiency (such as selenium, zinc, vitamin B), prolonged illness (such as typhoid, tuberculosis), hormonal changes (such as during pregnancy, menopause, thyroid disorders), stress.
INCIDENCE

  • Seen commonly in 20-50 yrs. of age.
  • The incidence in male & female varies from 3:1 to 2:1.