Acne Basics: Why It Happens & How to Treat It

Acne is common, real, and not a sign that someone is dirty or failing at skincare. Understanding what it is—and what everyday products can realistically do—makes it easier to choose a calmer next step.

What acne is

Acne develops when pores become clogged. Puberty-related hormones can increase oil production, which is one reason breakouts commonly begin during the teen years. Acne can include blackheads, whiteheads, red bumps, pus-filled bumps, or deeper painful nodules and cysts. Different patterns may need different care.

Acne is not caused by dirt sitting on top of the skin, and it is not contagious. Washing harder or more often does not clean acne away; it can irritate skin and make a routine harder to tolerate.

What everyday skincare can do

• Gentle cleansing can remove surface oil, sweat, makeup, and sunscreen without deliberately stripping the skin.
• Moisturizer can support comfort and help offset dryness, including dryness that sometimes accompanies acne treatment.
• Non-comedogenic products are formulated not to clog pores for most people, though no label guarantees that every product will work for every person.
• Sun protection helps protect skin from ultraviolet damage. AAD guidance recommends broad-spectrum, water-resistant SPF 30 or higher for exposed skin.
• Consistency makes it easier to judge a routine than changing products every few days.

What about acne-treatment ingredients?

The AAD’s updated acne guideline supports several evidence-based options, including benzoyl peroxide, topical retinoids, salicylic acid, and azelaic acid. Which option makes sense depends on age, acne type, other products and medicines, pregnancy considerations, and skin tolerance. Teens should use medication labels exactly as directed and involve a parent or guardian and a healthcare professional when unsure.

What skincare cannot promise

No cleanser or moisturizer can promise poreless, permanently clear skin. A routine also cannot diagnose whether a breakout is acne, folliculitis, perioral dermatitis, eczema, an allergic reaction, or another condition. If something is painful, rapidly worsening, or unusual for you, guessing through more products is not the best next step.

Diet claims also deserve care. The National Institute for Health and Care Excellence (NICE) acne guideline says there is not enough evidence to support a specific diet as an acne treatment. Food can still matter to overall health, but acne is not a moral report card on what someone ate.

Dark marks, scars, and why picking matters

Picking or squeezing can prolong healing and increase the risk of scarring and post-inflammatory hyperpigmentation—the dark marks that can remain after a blemish, particularly in deeper skin tones. The safest message is simple: hands off when possible, use sun protection, and get help early if acne is leaving marks or scars.

When professional care matters

A pediatrician, primary-care clinician, or dermatologist can identify the acne type and discuss treatment. Ask for help when acne is:

• deep, painful, or widespread;
• leaving scars or persistent dark marks;
• not improving after a fair trial of correctly used over-the-counter care;
• causing swelling, a spreading rash, or signs of infection; or
• affecting confidence, mood, school, relationships, or daily life.

NICE specifically recognizes acne’s potential effect on mental health and wellbeing. Skin concerns do not have to be “severe enough” for someone to deserve support.

Sources

1. American Academy of Dermatology: Updated Guidelines for the Management of Acne (2024)
2. American Academy of Dermatology: Acne—Who Gets It and Causes
3. American Academy of Dermatology: Acne—Tips for Managing
4. American Academy of Pediatrics / HealthyChildren.org: Teen Acne—How to Treat & Prevent This Common Skin Condition
5. National Institute for Health and Care Excellence: Acne Vulgaris—Management (NG198, updated 2026)