Milk
Milk contains certain bacteria that help in lightening the skin layer naturally without causing any irritation. Any type of milk, such as sour milk and even buttermilk, is very effective in lightening the skin tone naturally. The presence of lactic acid in milk is responsible for giving the skin lightening effect. If you are suffering from melasma, you can apply any kind of milk directly on your affected area to get positive results. You can use a cotton ball to soak in milk and then apply this cotton ball on the dark patches to treat any skin discoloration as natural remedies do not work faster, so you must persistently use this remedy to reduce the dark patches on the skin.