Hi thanks for writing here.Acne is primarily a hormonal condition driven by male or ‘androgenic’ hormones, which typically become active during the teenage years. Sensitivity to such hormones, combined with bacteria on the skin, and fatty acids within oil glands, cause acne. Common sites for acne are the face, chest, shoulders, and back the sites of oil glands.
Acne lesions include whiteheads, blackheads, small bumps, and nodules and cysts.
Fluctuating hormone levels around the time of menses (women)Manipulating (picking/prodding) acne lesions can aggrevate acne. Only three types of drugs have proven to be effective for the treatment of acne benzoyl peroxide, retinoids, and antibiotics. Most people require at least one or two agents, depending on the severity of their acne.Please remember any treatment takes at least 4 to 6 weeks to respond and initially there may be flare up . To prevent acne and reduce its damage to your skin, follow these tips.

Choose a cleanser specially formulated for acne. These products often contain salicylic acid or benzoyl peroxide, which help to clear acne sores.
Clean your face gently, as trauma to the acne breakouts may worsen the acne or cause scarring. When washing your face, use your hands, as any terrycloth or other scrubbing material may cause acne sores to rupture.
If you need to use a moisturizer, use only light, noncomedogenic moisturizers, which do not aggravate acne. This type of product may be your best option.
If you are a woman, use an oil-free foundation. Heavy makeup or other cosmetic products that block pores may cause a flare-up of acne. There are some new treatments available for acne such as chemical peel,lasers .You can consult your dermatologist for that.They have excellent results.Take care.