There are a lot of spots on the arm, consider mostly post-inflammatory hyperpigmentation spots, florid chaff rash, vitiligo and so on. You need to identify the cause and treat the symptoms.
1. Post-inflammatory hyperpigmentation spots: some hyperpigmentation spots may remain after inflammation. This kind of spots will be gradually eliminated with the gradual elimination of inflammation, and these spots will gradually fade away.
2. florid chaff rash: lesions characterized by brown or yellowish or reddish dotted rash, can be gradually expanded from dotted to round, the occurrence of this disease is mostly due to the skin suggests that Malassezia overproliferation caused by.
3. Vitiligo: is a common skin pigmentation loss skin disease. The main manifestation of the skin present milky white or light pink border clear, smooth depigmented spots.
If there is no obvious cause of many spots, it is recommended to go to the dermatology department for examination, do not blindly treat yourself.