The flat, brown spots which appear in groups on your skin are called freckles. They are usually found on the face and according to dermatologists, they signify skin damage. Some precautionary measures include applying sunscreen every time you face long exposure to the sun. There are various blends available which make a great face pack like honey and water, buttermilk etc. Rubbing onion slices or applying sour cream also are proved to be useful. Papaya juice and lemon juice application can also be considered.