Effective remedies to reduce darkness of elbows and knees

Dark skin on the elbows and knees is a common occurrence and usually affects those with darker skin tones as such skin types are more likely to overproduce melanin. It may be a result of several factors including accumulation of dead skin cells, sun exposure, post-inflammatory hyperpigmentation, etc. Dark knees and elbows need no treatment. However, it is possible to lighten their appearance.

source https://www.newsbytesapp.com/news/lifestyle/home-remedies-for-dark-elbows-and-knees/story