In most cases of female pattern hair loss, the hairlines at the front and back of the head remain intact. As opposed to the “bald spot” or receding hairline that commonly distinguishes men with hereditary hair loss, women typically experience an overall thinning of the hair just behind the frontal hairline or middle scalp area and extending back to the crown (top of the head).

A widening of the part or a decrease in pony tail width is usually the most noticeable sign that hair loss is occurring. Hairs tend to be miniaturized or of various lengths and diameters in the affected area. An abnormally high number of hairs found on brushes or combs, pillows or in the shower drain may be the first noticeable indicators of the condition. However, female pattern hair loss may not be visually identifiable in an affected area until significant thinning or hair loss has occurred.

Hair loss is not usually a cause for concern. However, it can be an early sign of certain diseases (e.g., diabetes, lupus, hypothyroidism, hyperthyroidism). Hair loss may also develop as the result of poor nutrition (e.g., iron deficiency), skin damage or as a side effect of certain medications. Women who are troubled by their hair loss should consult a dermatologist, especially if the condition is accompanied by other symptoms such as itching or skin irritation.