Dark knuckle can be as a result of many factors: it can be as a result of certain intake of drugs, inheritance or lack of vitamins in the body.
But mostly it happens as a result of strong acidic substance found in the product use for skin, it break down the Melanin present in it, These product are commonly reffered to as BLEACHING CREAM
Apply lemon juice with cotton ball to your knuckles daily
LEMON JUICE + HONEY
Apply the mixture of lemon juice and honey to the affected area and wash with lukewarm water after 10mins
Lemon juice serves as the natural bleaching agent while the honey keeps it mosturized and healthy, the mixture is very effective in combacting dack knuckles
Almond oil is very effective in removing dark knuckles, massage the affected area gently with oil, then leave it overnight, wash it early in the morning with lukewarm water. The almond oil reduce pigmentation and make your knuckles lighter