I used to have thick hair but over the past ten years it has thinned out. I can no longer wear a pony tail without scalp showing. Even if I just pull my hair back to the base of my neck you can see my scalp. I haven't taken any medications beyond the birth control that I am currently on. Is there any way to treat this or make my hair grow? Hair loss can be caused by any number of conditions.There may be a hormonal imbalance, possibly from the birth control pills. A medical workup is necessary to rule out high androgen levels, or telogen effluvium, among other things. This would be the first step. Your ponytail may also be the problem. A condition known as traction alopecia occurs when tight ponytails cause tension on the hair and the scalp. The first task is to release the tension. You always can adopt a new hair style. The traction alopecia may not be permanent. An effective treatment of traction alopecia is to simply avoid hair styling that puts excessive strain on the hair roots. Even after avoiding the causes of the traction alopecia it may take a period of several months for the hair to recover from this severe hair pulling disorder. If traction alopecia continues for a long time and the same hair is repeatedly pulled out, then the hair follicles in the skin can become so damaged that they stop growing hair permanently. Signs to watch out for include an itchy red scalp, tension headaches, hair breakage around the scalp, and random bald patches.