In women, hair thinning at the crown could be a sign of alopecia. Most commonly, there are two types of alopecia: androgenic (or hormonally-triggered hair loss) and alopecia areata (an autoimmune disease), says Deanne Mraz Robinson, MD, FAAD, the chief medical officer of Ideal Image.

There are several possible causes of hair breakage at crown. One common cause is tight hairstyles that pull on the hair. Over time, this can lead to the weakening of the hair follicles and increased breakage. Another potential cause is damage to the scalp, which can occur due to conditions like psoriasis or eczema.