This FAQ gives direct, evidence-based answers about acne causes, treatments, and care decisions. Acne is a follicle-blocking condition where excess oil and dead skin trap bacteria and cause red spots and pus on face, chest, and back. Hormonal shifts in puberty push oil glands to make more oil, which mixes with dead cells and feeds bacteria. American Academy of Dermatology reporting estimates acne affects up to about 50 million people in the US each year, with about 85% of teenagers developing common acne at some point.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Official resources:
- Read the official guidance from NIH — Use this primary source to verify the official guidance.
- Read the official guidance from Nhs — Use this primary source to verify the official guidance.
Table of Contents
- What causes acne and who gets it?
- Which starting treatments have strong support?
- When are pills used for moderate to severe acne?
- Why does isotretinoin require strict safeguards?
- What can you buy without a prescription now?
What causes acne and who gets it?
The UK National Health Service explains in current NHS acne guidance that hair follicles block with excess oil and dead skin cells. Trapped bacteria then grow and drive inflammation, pus, redness, and spots. Face, chest, and back carry the most affected follicles. Puberty often starts the cycle when hormonal shifts push oil glands to make more oil.
That oil mixes with dead cells and feeds bacteria. American Academy of Dermatology reporting estimates acne affects up to about 50 million people in the US each year. About 85% of teenagers develop acne vulgaris, the medical name for common acne. Up to 20% may develop facial scarring. Psychological effects can include low self-esteem, anxiety, and depression.
Which starting treatments have strong support?
The American Academy of Dermatology 2024 guideline strongly recommends several topical treatments as foundational care. They include benzoyl peroxide, retinoids such as adapalene and tretinoin, topical antibiotics, and fixed-dose combinations, detailed in AAD acne guideline.
The US National Institute of Arthritis and Musculoskeletal and Skin Diseases explains how these topicals act. Benzoyl peroxide kills acne bacteria and may lower sebum, the oily substance that clogs pores. Retinoids come from vitamin A and treat lesions, curb inflammation, help prevent new breakouts, and help with scarring.
- benzoyl peroxide: kills bacteria and may lower oil
- retinoids such as adapalene and tretinoin: clear lesions, limit inflammation, and help prevent new acne
- topical antibiotics and fixed-dose combinations: used as part of foundational regimens
When are pills used for moderate to severe acne?
For moderate-to-severe disease, the same AAD guideline strongly recommends oral doxycycline paired with topical treatment. It advises against using oral doxycycline alone. The paired approach is the recommended standard for this severity group.
The guideline also strongly recommends oral isotretinoin for severe, scarring, treatment-resistant, or highly distressing acne. Distressing means acne that causes strong emotional burden or disrupts daily life. This option applies when scarring, persistence, or distress makes stronger treatment important.
Why does isotretinoin require strict safeguards?
Isotretinoin can cause severe birth defects in any amount. The Food and Drug Administration therefore requires prescriber, pharmacy, and patient enrollment in iPLEDGE, detailed in FDA iPLEDGE risk program. The program requires pregnancy testing and contraception controls.
Enrollment adds required tests and pharmacy checks before dispensing. The birth-defect risk shapes who can use it and how closely care teams must monitor treatment. People who may become pregnant need a clear prevention plan before starting.
What can you buy without a prescription now?
Managed Healthcare Executive reporting on a Galderma announcement notes wider over-the-counter access starting summer 2026. The Food and Drug Administration approved adapalene 0.1% plus benzoyl peroxide 2.5% Epiduo gel for ages 12 and older, described in FDA approval report.
Expanded access helps many people start a proven combination sooner. Persistent, painful, scarring, or nonresponding acne still needs dermatologist care. Seek dermatologist care promptly if any sign appears.
- acne persists despite consistent store-bought care
- bumps are painful or leave scars
- spots spread, darken, or do not respond