In most cases, acne products need to be used for at least 30 days before you can begin to ascertain its efficacy. Some skin and acne types may see noticeable results in a few days and end up totally clear in just a few weeks. Others may take several weeks to see the slightest change, or need to have their regimen adjusted as their skin adapts. Treating acne can often be a months-long process.
In general, it is recommended that people with acne do not wash affected skin more than twice daily. For people with acne and sensitive skin, a fragrance free moisturizer may be used to reduce irritation. Skin irritation from acne medications typically peaks at two weeks after onset of use and tends to improve with continued use. Cosmetic products that specifically say "non-comedogenic", "oil-free", and "won't clog pores" are recommended.
Scars (permanent): People who get acne cysts and nodules often see scars when the acne clears. You can prevent these scars. Be sure to see a dermatologist for treatment if you get acne early — between 8 and 12 years old. If someone in your family had acne cysts and nodules, you also should see a dermatologist if you get acne. Treating acne before cysts and nodules appear can prevent scars.