Black spots on the head may be caused by nevus, seborrheic keratosis, post-inflammatory hyperpigmentation and other factors.
1. Nevus pigmentosus: if exposed to ultraviolet radiation for a long time, it will activate local melanocytes, thus releasing a large number of melanin particles, causing the symptom of black spots on the head.
2. Seborrheic keratosis: with the growth of age, the local skin will gradually aging, and the maturation process of skin keratinocytes will appear obstacles, so the head will appear the symptoms of long black spots.
3. post-inflammatory pigmentation: if the head has suffered from eczema, dermatitis, urticaria and other diseases, the inflammatory metabolic products of these diseases will stimulate the synthesis of melanocytes, and a large number of local deposits, so that the patient appeared on the head of the symptom of a long black spot block.
Black spots on the head, there may be other reasons, need to go to the hospital in time to identify the cause, and with the doctor to give targeted treatment.