Elbows and ankles have thick black and thick keratin, which is why they turn black.
You can concentrate on moisturizing and whitening.
Eat more things containing vitamin e.
You can buy some white cream to brighten your elbows and ankles and rub it every day, which can improve this situation.
If you don't want to buy, wash it with hot milk every day, and the effect is obvious. I use that to touch my elbow, and it feels quite good ~ milk fragrance+tender and smooth feeling. . . I feel white in a week ~ stick to it
That's all ~ I wish MM white.