Acne is a common problem of your age and occurs due to blockage of oil glands in the skin and is 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 may leave behind spots and chances of dark spots increase if you fiddle with them.For acne visit a qualified dermatologist as it's takes some months treatment for results to show and treatment depends on your acne severity and skin type. You can visit www.eternisclinic.com for information regarding skin care tips for acne prone skin.