One of the main causes of dark knuckle or joints is the lack of moisture in the skin around your joins.Because the skin on your joints is thicker. it would require more moisture than other parts of your body . You will need to make sure your joints are properly moisturized at all times.
STRONG WHITENINGKNUCKLE REMOVER LOTION is an effective formulation that lightens and fades away black spots from knuckles. elbows, knees, toes and other areas of skin blemishes.

INDICATIONS:STRONG WHITENING KNUCKL EREMOVER is the new beauty revolutions for * Dark knuckle * Dark Armpit* Dark Neck * Pimples* Stretch Marks * Dllated veins* Dark Bikini Line * Black Spot

INGREDIENTS : Aqua,Ceteareth G(and) steary Alcohol, Cetearyl Alcoho, Glycerin, Stearic Acid,shea Butter, Hydroquinone,Fragrance. Sincon oil, cinnamate, D-Panthenol, Vitamin C, vitamin E, Triclosan, sodium , Propyl Paraben.
DIRCTIONS :Apply with cotton bud or cotton wool face pad on all affected spots after bath. Twice daily for best results.

CAUTION : Avoid contact with eyes. Rinse immediately if product comes in contact with them, if skin irritation occurs, discontinue usage. keep out of reach of children.