All acne is not, actually, created equal. This makes perfect sense, seeing as there are so many factors — i.e. hygiene, hormones, and genetics — that can both lead to and exacerbate your breakouts. But knowledge is power, and just knowing that there are different types, and that each kind requires its own plan of attack, puts you ahead of the clear-skin curve. Once you figure out what you're working with, it gets far easier to treat. Here, your ultimate guide to identifying, and then taking down, every type of acne out there, according to dermatologists. Find out how to identify and deal with the different kinds of acne, including blackheads, whiteheads, blind pimples, and cystic zits.
There are a number of mild chemical peels available over the counter, but acne scar removal requires a stronger peel typically administered by a doctor or dermatologist. Trichloroacetic acid (TCA) peels are slightly stronger than alpha hydroxy acid (AHA) peels and may be used for acne scar treatment. The strongest type, phenol peels, may cause significant swelling and require up to two weeks of recovery time at home. Neither are recommended for people with active severe acne.
For UVA protection, a sunscreen with a high UVA protection of PA+++ or higher of PA++++ as recommended, especially to treat PIE. PPD is the UVA equivalent of SPF; use a sunscreen with a minimum of PPD20. The PA+ system has a + that corresponds to a tier of PPD protection. Of note, different countries use different PA systems. Japan and Taiwan changed their PA system to a 4+ tier system while Korea uses a 3+ tier system.

Dermal or subcutaneous fillers are substances injected into the skin to improve the appearance of acne scars. Fillers are used to increase natural collagen production in the skin and to increase skin volume and decrease the depth of acne scars.[145] Examples of fillers used for this purpose include hyaluronic acid; poly(methyl methacrylate) microspheres with collagen; human and bovine collagen derivatives, and fat harvested from the person's own body (autologous fat transfer).[145]

Acne scars are caused by inflammation within the dermal layer of skin and are estimated to affect 95% of people with acne vulgaris.[31] The scar is created by abnormal healing following this dermal inflammation.[32] Scarring is most likely to take place with severe acne, but may occur with any form of acne vulgaris.[31] Acne scars are classified based on whether the abnormal healing response following dermal inflammation leads to excess collagen deposition or loss at the site of the acne lesion.[33]
Acne medications work by reducing oil production, speeding up skin cell turnover, fighting bacterial infection or reducing inflammation — which helps prevent scarring. With most prescription acne drugs, you may not see results for four to eight weeks, and your skin may get worse before it gets better. It can take many months or years for your acne to clear up completely.
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