1. Lemon Juice
Squeeze some fresh lemon juice and put it over the dark spot for 15 minutes once every day.
2. Vitamin E
Rub Vitamin E on the dark spot twice a day.
Cut up a fresh potato and rub the potato juice on to the skin and leave it for 15 minutes, make sure to cleanse and moisturize after as potato dies dry out your skin.
Mix turmeric with honey and apply it on the dark spot once a day.
Apply papaya juice on the dark spot once a day, make sure to cleanse and moisturize after.