From your description it sounds like you have what is known as milia. Milia are cysts that are filled with keratin. Since there are several reasons for the development of white pimples, it is a good idea to consult a doctor before you begin on any mediation.
Milia, or drops of protein that are trapped under your skin, can be treated by cleaning your skin thoroughly. However, always keep in mind the fact that excessive cleansing or using harsh chemicals could cause more harm than benefit. Therefore, be sure to use gentle cleansers to clean your face. This will help remove the dry and dead skin, thus opening up the pores. For an easy exfoliating mask that you can make at home, mix some oatmeal with milk and apply the paste on your face. Leave to dry and then wash off.Mix the white of one egg with two spoons of oatmeal and apply this paste on your face. Let it dry and then wash off.
Also, since exposure to the sun is one of the possible reasons for the development of this condition, saving yourself from the rays of the sun is a good idea. If you cannot altogether avoid the sun then use a gentle sun screen. Better still, go in for an old fashioned umbrella or sport a wide-brimmed hat.
answered by G M