What could cause my hair to turn curly at age 60?

Hair Loss in Women: Hair loss in men occurs secondary to the influence of male hormones such as testosterone and testosterone derivatives which affect sensitive hair follicles. In women there is a change in hormonal balance with age causing relatively higher testosterone levels that influence hair density and texture. Medical conditions such as thyroid levels also affect hair growth.

Hormone changes: Hormonal changes in men and women may change hair in color, thickness and type.

Curly hair after 60: Grey hair itself has a different composition and structure than your natural color and this can produce irregularities in the hair which make it appear curly as well.