A piece of hair loss on the head may be the cause of patchy baldness, pseudo-patchy baldness, syphilitic alopecia.
1. Patch baldness: Patch baldness is a kind of non-scarring alopecia, which often occurs in the parts of the body with hair, local skin is normal, no conscious symptoms, the skin lesions are round or oval non-scarring alopecia, and the exclamation point-like hairs can be seen on the edge of the patch baldness, which can be healed by itself and the hairs can be regenerated.
2. Pseudo-patterned baldness: pseudo-patterned baldness belongs to scarring alopecia, the hair loss on the scalp is similar to that of patches of baldness, but the local skin is atrophied, the hair follicles are atrophied, and no hair can grow again, the boundary of the alopecia areata is clear, and the hair edge pulling test is negative.
3. Syphilitic alopecia: syphilitic alopecia is characterized by irregular edges of the alopecia area, worm-eaten, incomplete alopecia, large number of hair loss, preferably occurring in the back of the occiput, and positive syphilitic serology test.
If there is a piece of hair loss on the head, you need to go to the hospital in a timely manner to clarify the cause, the doctor according to the situation of the individualized treatment plan.