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Emergency care is not usually needed for acne itself, but a severe allergic reaction to a skin product needs urgent help. Get emergency care right away for trouble breathing, swelling of the face or throat, or fainting.

Tier 1 · General Education

Acne

Acne is a very common skin condition that happens when hair follicles become clogged with oil, dead skin cells, and sometimes bacteria. It can cause blackheads, whiteheads, pimples, and deeper painful lumps, most often on the face, chest, shoulders, and back.

AI-DRAFTED · Last generated 2026-09-18
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Key Facts

  • Acne often starts around puberty but can happen at any age.
  • It can appear as blackheads, whiteheads, pimples, or deep tender bumps.
  • Hormones, genetics, skin products, and friction can make acne worse.
  • Acne is not caused by being unclean.
  • Untreated acne can sometimes lead to dark marks or scars.

Overview

Acne is a long-term inflammatory skin condition involving the oil glands and hair follicles. It develops when pores become blocked and inflamed. Some people have mild breakouts, while others have widespread or painful acne that can affect confidence and daily life.

Key Symptoms

Symptoms can include blackheads, whiteheads, small red bumps, pimples with pus, and deeper nodules or cyst-like lumps. Acne most often affects the face, forehead, chest, upper back, and shoulders because these areas have more oil glands. The skin may also feel oily, tender, or become marked after spots heal.

Causes and Risk Factors

Acne is linked to excess oil production, clogged pores, inflammation, and growth of skin bacteria involved in acne. Hormonal changes, especially during puberty, menstrual cycles, pregnancy, or conditions that affect hormones, can play a role. Family history increases risk, and some cosmetics, hair products, helmets, masks, tight clothing, or frequent skin friction may worsen acne in some people.

Who Is Affected

Acne is especially common in teenagers, but it also affects adults, including people in their 20s, 30s, and beyond. It can occur in all skin tones and skin types. Adult acne may be more common in women, partly because of hormonal changes.

Prevention

Gentle skin care can help reduce irritation and clogged pores. Washing with a mild cleanser, avoiding harsh scrubbing, removing makeup, and choosing non-comedogenic skin and hair products may help. Try not to pick or squeeze spots, because this can increase inflammation, dark marks, and scarring.

Diagnosis and Tests

Acne is usually diagnosed by a healthcare professional through a skin examination. Tests are not always needed, but they may be considered if acne is severe, sudden, or linked with other symptoms that suggest a hormone-related condition. The pattern of breakouts and whether scarring is present can help guide treatment choices.

Treatment Categories

Treatment depends on how severe the acne is and whether scarring is developing. Options may include topical treatments, oral medicines, hormone-related treatment approaches, and procedures used by skin specialists for certain cases. Acne treatment often takes weeks to months to show improvement, so follow-up is important.

Living With It

Acne can affect self-esteem, mood, and social confidence, especially when it is visible or leaves marks. Support from family, friends, or a healthcare professional can help if acne is affecting emotional well-being. Early treatment may lower the chance of permanent scarring.

Diet and Lifestyle

Skin reacts differently from person to person, and no single food causes all acne. Some people notice their acne flares with certain foods, so keeping track of patterns may be helpful. Managing stress, getting enough sleep, and using consistent gentle skin care may support overall skin health.

When to Seek Medical Care

See a healthcare professional if acne is painful, severe, spreading, leaving scars or dark marks, or not improving with basic skin care. Medical advice is also important if acne begins suddenly, is linked with irregular periods or excess facial hair, or is affecting mental health. Seek prompt care for signs of a serious reaction to a skin product, such as severe swelling, trouble breathing, or faintness.

Related Topics

Tests & screening

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Sources & Citations

  1. [1]Acne — National Institute of Arthritis and Musculoskeletal and Skin Diseases
  2. [2]Acne: Overview — National Health Service
  3. [3]Acne — MedlinePlus, U.S. National Library of Medicine

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