According to FamilyDoctor.org, the normal cycle of hair growth lasts around 2 to 3 years. Losing small amounts of hair is normal; however, excessive amounts of hair loss and an itchy scalp in women can be the result of a medical condition or illness. There are a number of factors that contribute to these conditions.
MayoClinic.com states that some hormonal changes and imbalances in the body can result in temporary hair loss. This can be due to a number of factors such as the onset of menopause, childbirth, or an underactive thyroid gland. If hair loss is due to a hormonal balance, it may be associated with overproduction of testosterone, which can cause the thinning of hair over the crown of the scalp. Following a hormonal imbalance, hair may take three months to grow back.
According to MayoClinic.com, an itchy and dry scalp may be due a scalp infection such as ringworm, which invades the hair and scalp skin and contributes to hair loss. Infections are usually treated with an oral or topical antifungal medication. Once conditions have improved, the hair will most likely grow back.
Hair disorders may cause hair loss. According to the University of Maryland Medical Center, a hair condition called alopecia is responsible for the loss and thinning of hair. The condition results in hair loss all over the scalp or in certain areas, a receding hair line and inflammation on the scalp. Alopecia and other hair disorders are usually triggered by diseases, pregnancy certain medications or bacterial infections.