Skin is easily affected by disease since it is covering the whole body, any germs or organism which causing diseases to body will first try to enter into our body through skin only. Skin diseases are causing due to the lack of vitamin D in our body. One can get this vitamin D by rays of sunlight. If we use skin care products like sunscreen lotion it filters and send whatever is good to our body. This may also lead to disease called rickets due to over exposure of skin to sunlight. A bag under the eyes is also a disease which is caused due to the infection of skin in the body.