Traction alopecia - certain hairstyles such as when you pull on your hair tightly can cause scarring of the hair follicles. If pulling is stopped before scarring to the scalp then your hair will grow back normally. Nervous habits such as continual hair pulling or scalp rubbing can also cause scarring and ultimately permanent hair loss. Excessive shampooing and blow-drying can also cause hair loss. 

Laser treatments. Low-level laser therapy (LLLT) is used for the prevention and reversal of hair loss. Also known as red light therapy, cold laser, and soft laser, it is a form of light/heat treatment (therefore generally safer) that is used on cases of pattern baldness and alopecia areata. The procedure uses a device that emits light that penetrates into the scalp. The more commonly used lasers are the excimer, helium-neon and fractional erbium-glass. The procedure can increase the blood flow in the scalp to stimulate the follicles that are in resting or dormant phase to go into anagen, and at the same time, prevent the production of DHT, which destroys the hair follicles.

Telogen effluvium - occurs mainly due to the body’s reaction to stress, brought about by, illnesses such as cancer, mental and emotional disturbances, medications such as blood thinners, hormonal imbalances, stress during childbirth and so on. In this condition hair thinning occurs on the scalp. The hair usually regrows after the stress period is over.
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