Hi Pimples are common at your age and occur due to blockage of oil from oil glands in the skin and it occurs under hormonal influence. Certain factors which may aggravate pimples are stress, oil based occlusive cosmetics and food items like milk and other dairy products. Pimples usually leave behind spots and chances of dark spots increase if you fiddle with them. Don't just try something but take proper treatment under a qualified dermatologist. Severity of pimples vary and treatment is always individualised. You need maintenance treatment after the results too. Best regards Dr Vijay Adhe, Eternis Skin & Hair Clinic, Pune. www.eternisclinic.com