Think about it. Two years is a long time for hair to be subjected to the daily wear and tear of the environment, washing, drying, brushing, combing and any chemical processing. Just imagine what a piece of silk or fine fabric would look like after 2 years of constant handling.
Call your doctor if:
You are losing hair in an atypical pattern.
You are losing hair rapidly or at an early age (for example, teens or twenties).
You have any pain or itching associated with the hair loss.
The skin on your scalp under the involved area is red, scaly, or otherwise abnormal.
You have acne, facial hair, or menstrual irregularities.
You are a woman and have male pattern baldness.
You have bald spots on your beard or eyebrows.
You have been gaining weight or have muscle weakness, intolerance to cold temperatures, or fatigue.
Each individual hair survives for an average of 4 1/2 years, during which time it grows about half an inch a month. Usually in its 5th year, the hair falls out and is replaced within 6 months by a new one. Genetic baldness is caused by the body's failure to produce new hairs and not by excessive hair loss

Diagnostic tests that may be performed (but are rarely needed) include:
Microscopic examination of a plucked hair
Skin biopsy (if skin changes are present)
Hair transplants performed by a physician is a surgical approach to transferring growing hair from one part of the head to another. It is somewhat painful and expensive, but usually permanent
Both men and women tend to lose hair thickness and amount as they age. Inherited or "pattern baldness" affects many more men than women. About 25% of men begin to bald by the time they are 30 years old, and about two-thirds are either bald or have a balding pattern by age 60.
