Elbows and Knees ?

Question

why do somepeople have black knees and elbows? and is there anyway to remove it?

Answer 1

Cut a lemon in half and rub it on your elbows and knees a little bit everyday

Answer 2

solution: dermaline skin whitening cream for dark skin spots.

it's safe without the harmful effects of hydroquinone, mercury or steroid.

Answer 3

use lemon and sugar paste and apply and leave for few minutes. wash it ... do it every day