Carpal Tunnel Syndrome And Tarsal Tunnel Syndrome Carpal tunnel syndrome is a condition in which irritation of the wrist's median nerve causes tingling and numbness of the thumb,...learn more Â». In This Article.
1 Argyria-characterised by a metallic, slate-grey or blue-grey pigmentation. 2  The hyperpigmentation is most apparent in the UV-exposed areas of skin, especially the forehead, nose, and hands, as well as mucous membranes. 3  Argyria results from prolonged contact with or ingestion of silver salts.
Hereâs why: Brown pigment in our skin is produced by special cells that make melanin. Most of the skin lighteners block the formation of this pigment. So, they really donât âbleachâ the skin, they just stop the pigment from being produced and it eventually wears off. The safe pigment reducers are vitamins like vitamin C, vitamin A, and vitamin B3 (niacin). Other herbs like emblica and licorice, and fruit acids like glycolic acid, also work.