LEMON AND HONEY:
Honey is a great moisturizer and helps prevent drying and darkening of skin. Lemon juice has bleaching properties. A mix from one tablespoonful of honey and juice from a single lemon will work wonders. Apply the mix on affected areas and leave for 20 minutes. After this clean it with plain water
ALOE VERA GEL:
Alo vera gel is a great remedy for removing darkening of knee and elbow skin due to sunburn. Extract fresh gel from the Aloe leaves and rub on the darkened areas.
Baking soda is excellent for treating darkened skin. Both milk and baking soda has a cleansing effect on the skin. Take a tablespoonful of baking soda and mix it up with milk in a cup. Apply this mix on your darkened elbows and knees in a rotational motion. This therapy must be repeated every alternate day until you get a positive result