Lemon juice is effective for lightening knees and elbows at home. Simply apply lemon juice to the affected areas and leave on for at least 30 minutes then was off. You can even leave it on overnight and wash it off in the morning. Applying lemon juice daily will start to give results in about 3 weeks. There are also a number of skin lightening creams specifically for lightening knees and elbows available.
Pearl powder can be used as a topical treatment. Mix a pinch of pearl powder with two to three tablespoons of almond oil. Rub it on your knees and on your elbows. Almond oil also helps because of its ability to hydrate the skin and inhibit melanin.
The main reason behind darkening of skin is the production of Melanin. In order to inhibit its formation which is mostly caused due to exposure to sun, we should use Meladerm. This cream easily acts on your covering and reduces Melanin production. Meladerm doesn’t contain Hydroquinone, which is supposed to be one of the most dangerous ingredients. One should completely avoid the usage of mercury, steroids and hydroquinone for preventing various deadly disorders such as leukemia, liver damage and thyroid disorders.