Patchy Hair Loss Causes Treatment Options Hims One of the most common causes of patchy hair loss in women is a hereditary condition known as female pattern baldness. this condition tends to patchy hair loss become apparent gradually. it also comes in predictable patterns, usually characterized by hair thinning in women. heredity or your family history also plays a major role in when you will start to lose hair, the extent of patches or baldness, and the. How long hair loss lasts depends on the cause. in telogen effluvium, for example, hair usually is lost over several weeks to months, but then grows back over the next several months. when hair loss is a side effect of a medication, hair growth usually returns to normal once the drug is stopped. if you are losing hair because of abusive hairdressing, the hair loss usually stops after you change to more natural styling, except in traction alopecia, which results from years of pulling the hair b Compared to male-pattern baldness, which...