Male hair loss usually follows a pattern of a receding hairline, followed by thinning of the hair on the crown and temples.
Female hair loss usually starts to gradually thin on the top of the head.
Hair loss can be caused from stress, water pollution to harmful chemicals in hair products and excessive styling, there is a variety of external factors that will affect the normal function of the hair follicles.

A receding hair line is usually related to hormonal shifts in females and hereditary conditions in males.