Inflammatory Acne: Causes, Treatments & How to Prevent?

They can hurt when you touch them, linger for weeks, and leave behind dark marks or scars even after the swelling goes down. If this sounds familiar, you may be dealing with inflammatory acne, a form of acne that develops deeper in the skin and can be harder to manage with basic skincare alone.

The good news? It is treatable. The right approach depends on how severe the breakouts are, what is triggering them, and how your skin responds to treatment.

What Is Inflammatory Acne?

So, what is inflammatory acne exactly?

It is acne in which inflammation becomes a major part of the skin reaction. A clogged follicle can become irritated and inflamed, leading to a red, raised lesion. When the inflammation occurs deeper in the follicle, larger and more painful bumps can develop.

Cleveland Clinic describes Inflammatory Acne as red, swollen and sore blemishes that commonly appear on the face, back, chest and shoulders. These lesions may contain pus, dead skin cells, bacteria and excess oil.

Common inflammatory lesions include:

• Papules: Small, raised, red or discolored bumps.
• Pustules: Inflamed bumps containing pus.
• Nodules: Firm, painful lesions that develop deeper beneath the skin.
• Cysts: Deep, painful, pus-filled lesions that can increase the risk of scarring.

This differs from non-inflammatory acne, which typically includes blackheads and whiteheads without the same degree of swelling and tenderness.

MBCP also discusses related severe forms of acne in its guides on Nodular Acne and Cystic Acne. These conditions can require more intensive treatment and professional evaluation.

What Causes Inflammatory Acne?

Understanding inflammatory acne causes starts with understanding what happens inside a hair follicle.

Your skin contains sebaceous glands that produce sebum, an oily substance that helps protect the skin. Problems begin when excess sebum mixes with dead skin cells and blocks a hair follicle.

Bacteria and inflammation can then contribute to the development of acne lesions.

Mayo Clinic identifies four major factors involved in acne:

• Excess sebum production
• Clogged hair follicles
• Bacteria
• Inflammation

But acne rarely has just one trigger.

Hormonal Changes:

Hormones can influence how much oil your sebaceous glands produce.

Androgens, including testosterone, can stimulate these glands. This is one reason acne commonly develops during puberty. Hormonal fluctuations can also contribute to adult acne, including breakouts that occur around the menstrual cycle.

Excess Oil and Clogged Pores:

Sebum is not inherently bad. Your skin needs it.

The problem occurs when excess oil combines with dead skin cells and blocks the follicle. Once the follicle becomes clogged, inflammation can develop.

This is why simply washing your face more often does not necessarily solve acne.

In fact, harsh scrubbing can irritate the skin and make existing inflammation worse. Mayo Clinic specifically recommends gentle cleansing rather than aggressive scrubbing.

Bacteria and Inflammation:

Bacteria naturally live on your skin. Acne is not simply an infection caused by being “dirty.”

When a clogged follicle becomes inflamed, the immune system responds. That response contributes to redness, swelling, pus and tenderness.

This inflammatory process is a major reason some acne lesions become painful and deep.

Stress:

Stress does not directly create acne from nothing.

However, if you already have acne, stress may make breakouts worse. Hormonal and behavioral changes associated with stress can also influence the skin. Mayo Clinic lists stress among factors that may worsen existing acne.

Medications:

Certain medications can trigger or aggravate acne in some people. Mayo Clinic lists corticosteroids, testosterone and lithium among examples associated with acne.

If you suspect a medication is affecting your skin, do not stop taking it on your own. Talk with the healthcare professional who prescribed it.

What Causes Inflammatory Acne to Get Worse?

Knowing what causes inflammatory acne is only part of the picture. Certain habits can make existing inflammation more noticeable or increase the risk of complications.

Picking or squeezing:

That satisfying urge to pop a pimple can backfire.

Squeezing can push material deeper into the skin, increase inflammation, damage surrounding tissue, and raise the risk of scarring. Cleveland Clinic recommends avoiding picking, popping or squeezing acne lesions.

Harsh skincare:

Scrubs, strong astringents and frequent washing may seem like they will clear oil faster.

Instead, they can irritate the skin barrier.

Heavy or pore-clogging products:

Some cosmetics, sunscreens, moisturizers and hair products may contribute to breakouts. Mayo Clinic recommends choosing water-based or noncomedogenic products when possible.

Friction and pressure:

Helmets, tight collars, backpack straps, phones and other objects that repeatedly rub against acne-prone skin may worsen breakouts.

Treatment for Inflammatory Acne

The right treatment for inflammatory acne depends on the severity and type of lesions.

There is no single product that works for everyone. A dermatologist may recommend one treatment or combine several approaches.

Topical Treatments

Topical medications are applied directly to the affected skin.

Common options include:

• Benzoyl peroxide
• Adapalene and other retinoids
• Salicylic acid
• Azelaic acid
• Topical antibiotics in appropriate cases

These ingredients work differently. Some help unclog follicles, others reduce inflammation or bacteria, and some help prevent new lesions.

Mayo Clinic notes that adapalene can help unclog pores and prevent new breakouts, while salicylic acid can help unclog pores. Azelaic acid may also help prevent clogged pores and improve dark marks left after acne.

Oral Treatments

Moderate or severe inflammatory acne may require medication taken by mouth.

Depending on the individual, a healthcare professional may consider:

• Oral antibiotics
• Hormonal treatment
• Spironolactone for appropriate patients
• Isotretinoin for severe or treatment-resistant acne

Cleveland Clinic lists oral antibiotics, hormonal therapies and isotretinoin among options that may be used depending on the type and severity of acne.

These medications have different risks, contraindications and monitoring requirements. They should be used under professional guidance.

Procedures and In-Office Treatments

Some deeper or particularly painful lesions may benefit from procedures performed by a trained healthcare professional.

For example, corticosteroid injections may be used for selected inflammatory lesions. Other procedures may also be considered depending on the individual’s skin and treatment goals.

Do not attempt to perform extraction or injections at home.

How to Treat Inflammatory Acne at Home?

If you are wondering how to treat inflammatory acne when breakouts are mild, start with consistency rather than a complicated routine.

A practical routine may include:

Morning

1. Wash gently with a mild cleanser.
2. Apply your acne treatment as directed.
3. Use a noncomedogenic moisturizer.
4. Apply sunscreen.

Evening

1. Cleanse gently.
2. Apply your prescribed or appropriate acne medication.
3. Moisturize.

Do not add five new products at once. If your skin becomes irritated, it becomes difficult to know which product caused the problem.

How to Stop Inflammatory Acne From Coming Back?

You may wonder how to stop inflammatory acne once your skin starts improving.

The goal is not only to clear today’s lesions. It is also to prevent new ones.

Try these habits:

• Wash your face gently twice a day.
• Cleanse after heavy exercise or sweating.
• Choose noncomedogenic skincare and makeup.
• Avoid picking or squeezing.
• Keep hands away from your face when possible.
• Clean items that frequently touch your face, such as phones.
• Avoid tight clothing or equipment that repeatedly rubs acne-prone areas.
• Remove makeup before bed.
• Stay consistent with your prescribed treatment.

Prevention does not mean you can guarantee clear skin. Genetics, hormones and other factors remain outside your control.

Can Diet Affect Acne?

This topic gets complicated quickly.

Some research suggests that certain dietary patterns, including high-glycemic foods, may influence acne. Mayo Clinic notes that carbohydrate-rich foods may worsen acne in some people, although more research is needed to establish specific dietary recommendations.

Cleveland Clinic also notes associations between acne and foods such as skim milk, whey protein and high-sugar diets.

That does not mean everyone with acne needs to eliminate dairy, carbohydrates or specific foods.

A balanced diet is a better starting point than extreme restriction. If you notice a consistent relationship between a particular food and your breakouts, discuss it with a healthcare professional.

When Should You See a Dermatologist?

Occasional mild pimples may improve with appropriate over-the-counter care.

But professional evaluation becomes more important when acne is:

• Deep or painful
• Persistent
• Rapidly worsening
• Leaving scars or dark marks
• Affecting your confidence or daily life
• Not responding to consistent over-the-counter treatment
• Appearing suddenly and severely in adulthood

Mayo Clinic recommends seeking medical care when self-care does not clear acne or when acne is severe or persistent.

Early treatment can matter because deeper inflammatory lesions are more likely to leave permanent scars.

Can Clinical Research Help with Inflammatory Acne?

For people whose acne remains difficult to manage, clinical research may provide another avenue to explore.

Dermatology Clinical Research Studies investigate potential treatments under carefully defined protocols. Depending on the study, researchers may evaluate a new medication, formulation, device or treatment approach.

MetroBoston Clinical Partners conducts dermatology research in the Boston area and may have opportunities for eligible participants in acne clinical trials in Boston.

If you are considering research participation, eligibility depends on the specific study. The research team can explain the study requirements, procedures, potential risks and potential benefits before you decide whether participation is appropriate.