Let's Decode Your Acne, Shall We?

How to identify—and treat—every shape, size, and type of pimple.

a woman with a pimple overlayed with bubbles representing types of acne
(Image credit: Brittany Holloway-Brown/Future)

Hello and welcome to your very own acne crash course. Here’s the thing: We’ve all had a pimple, a breakout, heck, even an acne battle to contend with over the years. It’s normal—like so, so, so normal. But, if you are on the hunt for clearer skin, we feel you! We hear you! We got you! The first step? Identify the type of acne you're dealing with. Comedones, a.k.a. whiteheads and blackheads, are going to require a slightly different approach than a deep cystic or nodular pimple. Reason being, you need to address what’s causing you to break out in the first place. Occasionally hormonal fluctuations that coincide with your menstrual cycle are to blame, sometimes it’s congestion, and other times you’ll be dealing with wild inflammation. 

But through it all, dermatologists (and our handy-dandy guide to the different types of acne) should be your guiding light. Because whether you’re dealing with flares in your teens or are part of the 22 percent of women that develop adult acne, there are over the counter products (benzoyl peroxide! salicylic acid! adapalene!) and prescriptions that can calm down inflammation, prevent your pores from becoming clogged, and regulate hormones. Here, we’re explaining what each type of pimple looks like, what causes it, and how to treat every type of acne. 

Is My Acne Mild, Moderate, or Severe?

We can tell you how to treat every type of acne with skincare products until we’re blue in the face, but over-the-counter skincare products are only half of the equation. While they can do the job for mild and some moderate acne, they’re not going to be enough for someone with severe acne. If you fall into the latter category or can't manage your moderate acne alone, you’ll probably need to pair your OTC cleansers and moisturizers with prescription topicals and oral medication. So, how do you know which group you fall into? 

According to Dr. Robert Finney, board-certified dermatologist at Entieré Dermatology, mild acne is categorized by occasional breakouts that last a few days’ time. You might have some lingering hyperpigmentation, but it traditionally fades pretty quickly. “Moderate acne is when you’re starting to get some deeper pimples, they’re coming more regularly, and it’s actually more infrequent that your skin is clear. Once these flares do clear up, you’re left with marks that last for a little while,” he explains. “You’re closer to severe acne if you’re constantly having cystic lesions, you have signs of scarring from your acne past, and the breakouts last for a long time.” 

The Types of Acne

“There are five main types of acne lesions,” explains Dr. Shari Marchbein, board-certified dermatologist and founder of Niche Dermatology. “Blackheads and whiteheads are your foundational acne that leads to all other acne. Even small acne can turn into cystic lesions and lead to scarring and pigmentation, so it’s worth treating even the most mild of acne.” 

  • Blackheads: Resulting from a clogged pore that has oxidized, this non-inflammatory acne presents as a little black dot.
  • Whiteheads: Similar to a blackhead, a whitehead happens when a pore gets clogged. The difference is that whiteheads will typically have pus and inflammation.
  • Papules: If you have a dense, pus-less red bump on your skin, chances are you're dealing with a papule. Don't try and pop it—you'll get nowhere.
  • Pustules: Typically oozy, pus-filled (peep the name), pustules are typically accompanied by tender inflammation and discomfort.
  • Cystic-Nodular: You'll most commonly find cysts on the lower third of your face, as they're traditionally hormonal in nature. They're also referred to as "blind pimples," because while you will certain feel their inflammaion and tenderness, they live under the skin.

The treatment, says Dr. Finney, is dependent on which camp your acne falls into: Inflammatory (a.k.a. red and swollen) or non-inflammatory (a.k.a. skin-colored and congested). Inflammatory acne is going to be treated with antibacterial ingredients like benozyl peroxide, as well as oral medication, whereas non-inflammatory acne is best treated with ingredients like salicylic acid. For a more detailed breakdown on each type of acne and the accompanying treatment, keep reading. 

What Is a Blackhead?

types of acne

(Image credit: Brittany Holloway-Brown/Future)

Marked by a little black dot, blackheads are pretty easy to identify. “These are your congested and clogged open pores,” says Dr. Finney. They form when the opening of your hair follicle gets plugged up with oil, dead skin cells, or a mixture of both. Think: The more oil and more dead skin cells you have, the more likely you are to develop a plug. Then, when that collective gunk touches the air or interacts with pollution, it’s thought to oxidize and turn black. 

Blackheads are most likely to pop up on your T-Zone thanks to the high concentration of sebaceous glands (a.k.a. oil glands), but they’re also very common on the chin, back, and chest. It really depends on your skin’s makeup. “Follicles aren’t all created equal in size, toughness, or dexterity,” explains Dr. Finney. Men for instance may be more prone to have ruptured follicles where they shave, while others may have certain areas of follicles, like the on the nose, over-producing oil. 

How to Treat a Blackhead

Treatments targeting congestion and breaking up oil—like your salicylic acids, your Differin gels, and your exfoliants, are really going to help,” says Dr. Finney. That in mind, his first recommendation is typically going to be a retinoid, like over-the-counter adapalene or a prescription formula. While retinoids do have a multitude of benefits (read all about 'em in our comprehensive guide to retinols and retinoids), not everyone can tolerate the drying effects of a retinoid. “If you can’t tolerate a retinoid, my go-to prescription for congestion is azelaic acid. It targets congestion, but it’s also going to block hyperpigmentation.” 

You’re also going to want a lightweight, non-comedogenic gel moisturizer to combat the drying effects of the treatment, whether it’s OTC or from the dermatologist. (Reminder: Any time you're using a retinoid or exfoliant, it's even more important to wear a broad-spectrum SPF.) 

What Is a Whitehead?

types of acne

(Image credit: Brittany Holloway-Brown/Future)

Considered a closed comedone, whiteheads are typically going to be red at the base and have a little pus-filled head that is admittedly tempting to pop (don’t do it, people). What causes it to form, you ask? It’s very similar to the formation of a blackhead. The follicle ruptures thanks to the perfect storm of oil, dead skin cells, and bacteria overgrowth. Unlike a blackhead however, there’s an added layer of inflammation to address

“If there’s still oil production trying to get through once you have a blockage, it builds up behind it,” says Dr. Finney. “Bacterial overgrowth loves that inflammatory environment down there and creates micro-ruptures, the red appearance, and can eventually lead to the whitehead.” While there’s a very obvious blockage (peep the white pus), it’s still superficial in nature and located in the dermis, which is the uppermost layer of the skin. Pustules and cysts (we dive into those in a bit), are going to be rooted much deeper in the skin. 

How to Treat a Whitehead

One of the best over-the-counter treatments for whiteheads is going to be benzoyl peroxide, says Dr. Finney. “It’s going to be the strongest as a leave-on,” he explains. “Washes can help, but they’re only short contact. Anything that’s only sitting there for a few minutes is going to have less of an impact than something that you’re leaving on.” He also suggests incorporating either a retinoid or an azelaic acid product into your routine to help with congestion. And of course, use a sunscreen and moisturizer designed for acne-prone skin.

It’s also just as, if not more, important to keep your hands off your acne—no matter how tempting popping can seem. “It’s as if you’re seeing the tip of an iceberg with your whitehead. If you’re pressing on the tip, you’re also putting pressure on what’s going on underneath the surface. You can cause that follicle that’s already ruptured to rupture even more and bring more inflammatory cells,” Dr. Finney explains. “That’s why sometimes when you pop a pimple, it can turn into a whitehead again—and with more inflammation.” If you don’t trust yourself to keep your hands off, use a pimple patch. Dr. Finney recommends one with a hydrocolloid dressing, a little bit of salicylic acid, and micro-darts, all of which can “coax the gunk to come out.”  

What Is a Papule?

types of acne

(Image credit: Brittany Holloway-Brown/Future)

Baseline: “A papule is a raised bump on the skin’s surface that is less than one centimeter in size,” says Dr. Robyn Gmyrek, board-certified dermatologist at UnionDerm. “They usually develop from excess oil and dead skin cells clogging a pore.” Unlike a blackhead or whitehead though, papules are going to be solid, have no pus, and can be either red, flesh colored, or brown. While it’s not necessarily a prerequisite, Dr. Gmyrek explains that they can be tender if inflammation is involved. Anyone can get a papule, but they’re most common among oily skin types. Sensing the theme where oil is the culprit? 

A quick caveat: Papules aren’t always acneic in nature. They can also pop up after shaving. “A papule arises after shaving when the hair is trying to grow above the surface but meets resistance by dead skin cells clogging the follicle. The hair might then grow into the skin instead of out of the follicle,” explains Dr. Gmyrek. In response, the body triggers an inflammatory response to push the hair out. Enter: A razor bump. The same can be said for the papules that form after a bug bite or sting. That in mind, these two incidences are not acneic in nature and need to be treated differently. 

How to Treat a Papule

When treating a papule, you’re going to want to focus on decreasing bacteria, inflammation, and oil production. The best-antibacterial ingredient is going to be benzoyl peroxide. If your acne is more moderate or severe, your dermatologist may put you on prescription clindamycin lotion or pads. If your papules have inflammation, Dr. Gmyrek suggests over-the-counter adapalene or niacinamide, a gentler option.  And for oil buildup? Salicylic acid, azelaic acid, and retinol are considered effective ingredients. 

Just to reiterate: Don’t overdo it with active ingredients. Start with one product at a time to see how much your skin can handle. When in doubt, or if your acne is more severe or bothersome, go to the dermatologist. They might recommend prescription topicals, like Aczone, suggest Accutane, or put you on hormone blocking medication such as birth control or Spironolactone if your breakouts are correlated to your cycle. 

What Is a Pustule?

types of acne

(Image credit: Brittany Holloway-Brown/Future)

A pustule is defined as a papule that is not solid, but rather filled with white or yellow pus,” explains Dr. Gmyrek. “They start the same as a papule, but the body responds with a greater immune response that causes more inflammation, so there may be a greater bacterial load, too.” Think of a pustule like the papule's angrier big sister. “Pus is a natural result of the body fighting infection. It is a thick white or yellow fluid made up of dead white blood cells that the body has sent to kill infection, dead skin cells, and residual bacteria.” 

While pustules can be nipped in the bud (read below), it is possible for them to escalate into a more severe form of acne. “If a pustule is very deep on the skin or if your body’s immune response is not strong enough to kill the infection, the pustule can become a deep nodule requiring antibiotic treatment,” adds Dr. Gmyrek. 

How to Treat a Pustule

“When a patient presents to me with pustular acne, I know that they have excess oil and clogging of their pores, which has led to acne. They have a strong inflammatory response by their immune system and they have bacteria contributing to this process so, I try to address all of these components,” explains Dr. Gmyrek. As such, she treats pustular acne the same way as papular acne with products that are antibacterial (benzoyl peroxide), anti-inflammatory (niacinamide or adapalene), and de-clogging (salicylic acid, azelaic acid, retinoids)

Because pustules come along with more inflammation, they can be uncomfortable and can be more prone to scarring, so you may be more likely to seek treatment with a board-certified dermatologist. They will likely put you on a regimen that address all three causes with prescription retinoids, topicals, oral antibiotics, or hormonal therapy to control oil production.