Hello mam...... The sun tan is a common factor along with many others which cause such kind of skin darkening. Nowadays u get many creams, gels, tablets which claim for clear and glowing skin. However a detailed history and a proper examination by a skin specialist will guide u through the exact methods to get your skin rejuvenated. These can be the simple precautions which u can carry out, the creams or gels or the procedures which can give u the clear and lite skin. My advice to u would be the same , to get yourself examined. There is no single cream which can suffice all the varieties of skin needs. U can consult me or text online as well.