It might be bcoz of deficiency... But we ll have to rule of other infectious problems like leprosy though rare... Plz consult dermatologist in ur place and get tested..
Dark patches of black colour spots are there which has spread but does not pain or make me uncomfortable.
Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.