What is the normal cycle of hair growth and loss?
At any time, about 10% of the hair on your scalp is in a dormant phase. After two to three months, the hair that was dormant phase falls and new hair begins to grow in its place. This growing phase lasts between two and six. During this phase each hair grows approximately one centimeter per month. At any time about 90 percent of their scalp hair is growing.
It is normal to fall a little hair every day as part of this cycle. However, some people may experience an excessive loss (more than normal) hair.
What causes excessive hair loss?
A number of things can cause excessive hair loss. This hair loss is related to the stress of illness and is temporary.
Hormonal problems may cause hair loss. If your thyroid gland is overactive, or are less active than normal hair can fall out. This hair loss usually can be helped with treatment of thyroid disease. Hair loss may occur if there is a balance of male or female hormones known as androgens and estrogens. Correcting the hormone imbalance may stop the hair loss. (more…)