Just take vitamins and yellow palm.

Vitamin c is good for palm yellowing. Yellowing may be jaundice (hepatitis or hemolysis) or scleroderma. VC has a strong antioxidant function, which helps to diminish inflammation, slow down allergies, promote moderate cross-linking of collagen and improve scleroderma. But many other vitamins are good for palm yellowing, such as B group, vitamin A and vitamin E.