Androgenetic Alopecia

Besides the genetic origin and the presence of DHT (dihydrotestosterone) other factors can cause hair loss in women: female hair loss can be caused by persistent traction with ponytails or buns, and the start or end of making contraceptives oral.

Alopecia usually begins in women between thirty and forty. It is quite possible to start at times of hormonal changes. In general, women tend to have lower density diffuse hair across the top of the scalp and it clears from the front to the crown producing female alopecia.

Alopecia Areata
This disorder is characterized by sudden loss of hair in one particular area, the hair grows back after several months. However, if you lose your whole body hair suddenly, you may not grow back. The cause of this type of hair loss is unknown.

Toxic Alopecia
Toxic alopecia may occur following a high fever or serious illness. Certain medications, especially thallium, high doses of vitamin A and retinoids, may cause toxic alopecia. Medical conditions such as thyroid disease, or after birth may also trigger toxic alopecia. This condition is characterized by temporary hair loss. Also, some medications indicated for cancer can cause hair loss.

Scarring alopecia
May be that in areas where there was a healing process not grow hair. Scarring may occur from burns, wounds, or X-ray therapy Other diseases such as lupus, skin infections, bacterial or fungal, lichen planus, sarcoidosis, tuberculosis or skin cancer also cause other types of scarring that can cause hair loss.

Trichotillomania (hair pulling)
The hair pulling habit, common among children, can cause baldness.