Make the following hand mask and apply it once a week.
3 tbsp gram flour (besan)
2 tsp malai (cream of milk) or oil
juice of ½ lemon
¼ th teaspoon turmeric powder
2 tsp of glycerin
Mix all the ingredients together and make a smooth paste, you may add a little water, if needed. Apply this mixture over your hands and arms and leave for about 15 minutes and then wash it off.