Acne

Acne is a common skin condition that occurs when hair follicles become clogged with oil (sebum) and dead skin cells. It causes whiteheads, blackheads, pimples, and sometimes deeper, painful cysts or nodules. Acne most often appears on the face, forehead, chest, upper back, and shoulders—areas with the highest concentration of oil glands.

Although acne is most prevalent during adolescence because of hormonal changes, it can affect people of all ages. Adult acne is increasingly recognized, particularly in women. While acne is not dangerous, it can cause permanent scarring and significant emotional distress, affecting self-esteem and quality of life.

Modern treatment can effectively control most cases and reduce the risk of scarring when started early. A combination of good skin care, topical or oral medicines, and, when needed, procedural treatments usually brings clear or much clearer skin.

Acne lesions vary in type and severity:

• Whiteheads (closed comedones) — Small, flesh-colored or whitish bumps under the skin surface
• Blackheads (open comedones) — Dark spots on the skin surface caused by oxidized oil and dead cells in an open follicle
• Papules — Small red, tender bumps
• Pustules — Papules with white or yellow pus at the tip
• Nodules — Large, solid, painful lumps beneath the surface of the skin
• Cysts — Deep, pus-filled, painful lumps that can cause scarring

Acne is often graded as mild (mostly comedones with few inflammatory lesions), moderate (more numerous papules and pustules), or severe (many nodules, cysts, and widespread inflammation). Hormonal acne in adult women frequently appears along the jawline and chin and may flare before menstrual periods.

Four key factors interact to produce acne:

• Excess sebum production — Androgen hormones stimulate the oil glands to produce more sebum.
• Clogged hair follicles — Dead skin cells and sebum stick together and plug the follicle opening.
• Bacteria — Cutibacterium acnes (formerly Propionibacterium acnes) multiplies inside the clogged follicle and triggers inflammation.
• Inflammation — The immune response to bacteria and clogged follicles creates the redness, swelling, and pus of inflammatory acne.

Hormonal fluctuations (puberty, menstrual cycles, pregnancy, polycystic ovary syndrome, or certain medicines containing androgens or corticosteroids) are major triggers. Genetics also play a strong role; if your parents had significant acne, you are more likely to develop it. Diet, stress, and skincare products can influence severity in some people, although they are rarely the sole cause.

Factors that increase the likelihood or severity of acne include:

• Age — Peak incidence is in adolescence, but adult acne is common
• Hormonal changes — Puberty, menstruation, pregnancy, starting or stopping birth-control pills, and conditions such as polycystic ovary syndrome
• Family history — Strong genetic component
• Certain medications — Corticosteroids, testosterone, lithium, and some anticonvulsants
• Greasy or occlusive cosmetics and hair products
• Friction or pressure on the skin (helmets, tight collars, phone-against-cheek habits)
• Stress — Can worsen existing acne in some individuals
• Diet — High-glycemic foods and dairy products appear to aggravate acne in susceptible people

The main long-term complications of acne are:

• Scarring — Ice-pick, boxcar, or rolling scars can remain after inflammatory lesions heal. Nodular and cystic acne carry the highest scarring risk.
• Post-inflammatory hyperpigmentation — Dark spots that linger after lesions resolve, especially in darker skin tones
• Emotional and social impact — Acne is strongly linked to reduced self-esteem, anxiety, depression, and social withdrawal, particularly in teenagers and young adults.

Prompt treatment of inflammatory acne is the best way to minimize these complications.

While acne cannot always be completely prevented, the following measures reduce its severity and frequency of flares:

• Wash the face gently twice daily with a mild, non-comedogenic cleanser; avoid harsh scrubbing
• Use oil-free, non-comedogenic moisturizers and cosmetics
• Remove makeup before bed
• Avoid touching or picking at the face
• Keep hair clean and off the face; choose non-greasy hair products
• Shower after sweating heavily
• Consider a low-glycemic diet and reduced dairy intake if you notice a personal connection
• Manage stress with regular exercise, adequate sleep, and relaxation techniques

Consistent use of preventive topical treatments (such as retinoids or benzoyl peroxide) after clearing can help maintain results.

Acne is almost always diagnosed by clinical examination. A healthcare professional will look at the type and distribution of lesions, ask about duration, previous treatments, menstrual history (in women), and medication use. Laboratory tests are not routinely needed but may be ordered if an underlying hormonal disorder is suspected (for example, in women with sudden severe acne, irregular periods, or excess hair growth).

No special preparation is required for the visit, although it is helpful to bring a list of all products and medicines currently being used.

Consider seeing a dermatologist or primary-care clinician if:

• Over-the-counter products have not improved your acne after 6–8 weeks of consistent use
• Acne is moderate to severe, cystic, or covering large areas
• You are developing scars or dark spots
• Acne is causing significant emotional distress or affecting your confidence
• You suspect your acne may be related to a hormonal condition or medication

Early professional treatment reduces the risk of permanent scarring and helps identify the most effective regimen for your skin type and acne pattern.

Treatment is tailored to the severity and type of acne and to the patient’s age, skin type, and preferences.

Mild acne

• Topical retinoids (adapalene, tretinoin, tazarotene)
• Benzoyl peroxide
• Topical antibiotics (clindamycin, erythromycin) — usually combined with benzoyl peroxide to reduce resistance
• Azelaic acid or salicylic acid

Moderate acne

• Combination of topical agents plus oral antibiotics (doxycycline, minocycline, sarecycline) for a limited period
• Hormonal therapy for women (combined oral contraceptives or spironolactone)

Severe or nodulocystic acne

• Oral isotretinoin — highly effective but requires strict monitoring because of potential side effects and birth-defect risk
• Occasionally oral corticosteroids for short-term control of severe inflammatory flares

Procedural options such as corticosteroid injections into cysts, chemical peels, or laser/light therapies can complement medical treatment. Maintenance therapy after clearing is important to prevent relapse.

Daily habits that support medical treatment include:

• Gentle cleansing morning and night; pat dry rather than rub
• Apply treatments to the entire affected area, not just individual spots
• Use a non-comedogenic moisturizer even if you have oily skin—many acne medicines cause dryness
• Be patient; most regimens take 6–8 weeks to show clear improvement
• Never pick, squeeze, or pop lesions—this increases inflammation and scarring risk
• Wear sunscreen daily; many acne medicines increase sun sensitivity
• If using makeup, choose “non-comedogenic” or “oil-free” products and remove them thoroughly

To make the most of your visit:

• List all skin products, prescription medicines, and supplements you currently use
• Note how long you have had acne and what treatments you have already tried (including duration and results)
• For women, be ready to discuss menstrual cycle patterns and any hormonal symptoms
• Prepare questions about expected timeline for improvement, possible side effects, pregnancy considerations, and long-term maintenance
• Consider bringing photographs of your skin at different times if the severity fluctuates

Honest discussion of how acne affects your emotional well-being helps the clinician choose the most appropriate intensity of treatment.