Hi dear , As per your query you have dark skin complexion problem , Well this is very common problems in teens . The most probable reasons for your symptoms is excessive sun exposure . But there can be other reasons also like stress and hormonal changes . I would suggest you to wash your face with cold water and mild soap twice daily , apply kojic acid cream twice a day after washing face , exfoliate your face twice a week and try to cone your face and use broad spectrum sunscreen when under sun exposure . Also drink plenty of water at least 8-9 glasses of water . If condition doesn t get improve then consult dermatologist for proper examination and to find out if there is any underlying reason. Hope your concern has been resolved. Best Wishes, Dr. Harry Maheshwari