Hi welcome to HCMForum. the causes of black spots is vague and difficult to diagnise spontaneously.
Skin tecture is the main reason means defeciency of vit A E moisture etc. I advise you to consult
for diagnosis and treatment. besides i advise you some diet recomendations as take p
plenty of water fruits juices green leafy vegetables pulses for accelerating the action of the drugs
given by your doctor. thank you.