What actually clears acne

Acne clears when you reduce the bacteria that live in your pores, decrease oil production, shed dead skin cells faster, or reduce inflammation—and most effective treatments do more than one of these at once. The route that works depends on how severe your acne is, what type it is (blackheads, whiteheads, cysts), and how your skin responds to different ingredients.

Over-the-counter products can clear mild acne on their own. Moderate acne usually needs a prescription treatment. Severe acne—especially cystic acne or acne that leaves scars—almost always requires a dermatologist and often a prescription medication taken by mouth. Starting with the gentlest option that matches your acne's severity, then moving to stronger treatments if needed, reduces the risk of irritation and wasted time on things that won't work for you.

Key Takeaways

  • Benzoyl peroxide and salicylic acid are the two most common over-the-counter ingredients; benzoyl peroxide kills bacteria while salicylic acid unclogs pores.
  • Retinoids (including tretinoin, adapalene, and retinol) speed up skin cell turnover and require a prescription for the strongest versions, though weaker retinol is sold over the counter.
  • Oral antibiotics and hormonal birth control can reduce acne from the inside, but antibiotics work best paired with a topical treatment to prevent resistance.
  • Isotretinoin (Accutane) is reserved for severe acne because it can cause serious side effects, but it is the only treatment that can permanently clear acne.
  • Dermatologists can recommend the right starting point based on your acne type and skin, which saves time and reduces the chance of irritation.

Over-the-counter treatments for mild acne

Benzoyl peroxide kills the bacteria that cause acne. It comes in concentrations from 2.5% to 10%, and higher concentrations are not necessarily more effective—2.5% to 5% works for most people and causes less dryness and irritation. It is available as a wash, lotion, gel, or spot treatment. Benzoyl peroxide can bleach fabric and hair, and it may cause redness or peeling when you first start using it.

Salicylic acid is a beta hydroxy acid that dissolves the oil and dead skin cells inside pores, preventing them from clogging. It comes in concentrations from 0.5% to 2%, and like benzoyl peroxide, the lowest effective dose is usually best. Salicylic acid is gentler than benzoyl peroxide but works more slowly. It is sold as a cleanser, toner, or leave-on treatment.

Both can be used together—benzoyl peroxide in the morning and salicylic acid at night, for example—though starting with one and adding the other only if needed reduces irritation. If your skin is sensitive, start with the lowest concentration and use it every other day or every third day until your skin adjusts.

Prescription topical treatments

Retinoids speed up the rate at which your skin sheds dead cells and reduce inflammation. Tretinoin (Retin-A) is the strongest and requires a prescription; adapalene (Differin) is slightly weaker and is now available over the counter in some places; retinol is the weakest form and is sold without a prescription. All retinoids cause dryness, redness, and peeling at first, especially tretinoin. You start with the lowest concentration and use it only two or three times a week, gradually increasing frequency as your skin tolerates it. Results take 8 to 12 weeks to appear.

Topical antibiotics like clindamycin reduce bacteria. They work quickly but bacteria can become resistant if used alone for more than a few months, so dermatologists usually pair them with benzoyl peroxide or a retinoid. Topical antibiotics are most useful for inflammatory acne (red bumps and pustules) rather than comedonal acne (blackheads and whiteheads).

Azelaic acid reduces bacteria, decreases inflammation, and helps fade acne scars and discoloration. It is gentler than retinoids and can be used alongside other treatments. It is available by prescription and over the counter at different concentrations.

Oral medications for moderate to severe acne

Oral antibiotics like doxycycline or minocycline reduce the bacteria throughout your body that contribute to acne. They work best when paired with a topical treatment like benzoyl peroxide, which prevents bacteria from becoming resistant to the antibiotic. Oral antibiotics typically take 4 to 8 weeks to show results and are usually prescribed for 3 to 6 months. They can cause sun sensitivity, nausea, and yeast infections, and long-term use increases the risk of resistance.

Hormonal birth control can reduce acne in people who menstruate by lowering androgen levels, which decreases oil production. Not all birth control pills work equally—those containing norgestimate, norethindrone, or desogestrel tend to be more effective for acne. Results take 2 to 3 months and continue improving for up to 6 months. Birth control works best for acne along the jawline and lower face.

Spironolactone is a medication that blocks androgens and is used off-label for acne in people who menstruate. It is less commonly prescribed than birth control but can be effective when acne is clearly hormone-driven. It requires blood tests to monitor kidney function and potassium levels.

Isotretinoin for severe acne

Isotretinoin (Accutane) is a powerful oral retinoid that is the only treatment that can permanently clear acne. It is reserved for severe acne that has not responded to other treatments, acne that causes significant scarring, or acne that severely affects quality of life. A single course of isotretinoin clears acne in about 70% of people permanently; the rest may need a second course.

Isotretinoin can cause serious side effects: it is highly teratogenic, meaning it causes severe birth defects if taken during pregnancy, so people who can become pregnant must use two forms of contraception and have monthly pregnancy tests. It can cause severe dryness of skin, lips, and eyes; joint and muscle pain; headaches; and in rare cases, depression or inflammatory bowel disease. It requires monthly blood tests to monitor liver function and lipid levels.

Because of these risks, isotretinoin is prescribed only by dermatologists and requires enrollment in the iPLEDGE program, a risk management system that tracks prescriptions and pregnancy tests. The medication is expensive and often requires insurance approval.

What does not clear acne

Acne is not caused by poor hygiene or eating chocolate or greasy food, though some research suggests high-glycemic foods and dairy may worsen acne in some people. Washing your face more than twice a day or scrubbing hard can irritate skin and make acne worse. Sunscreen and moisturizer do not cause acne if you choose non-comedogenic formulas (ones that do not clog pores), and they are important when using acne treatments that dry out or irritate skin.

Toothpaste, baking soda, and other home remedies lack the evidence that prescription and over-the-counter acne treatments have. If you want to try a home remedy, do a patch test on a small area first, but do not delay seeing a dermatologist if acne is moderate or severe or if over-the-counter treatments have not worked after 6 to 8 weeks.

When to see a dermatologist

See a dermatologist if your acne is moderate to severe, if it is leaving scars, if over-the-counter treatments have not worked after 6 to 8 weeks, or if acne is affecting your mental health. A dermatologist can identify the type of acne you have, rule out other skin conditions that look like acne, and recommend the treatment most likely to work for your specific situation. They can also monitor you for side effects if you are taking isotretinoin or oral antibiotics.

If you cannot see a dermatologist, some primary care doctors can prescribe topical retinoids and oral antibiotics, though they may refer you to a specialist for more complex cases. Telehealth dermatology services can provide consultations and prescriptions in many places, though they cannot perform procedures like extractions or laser treatment.

Frequently Asked Questions

How long does it take for acne treatments to work?

Over-the-counter treatments like benzoyl peroxide and salicylic acid can show results in 4 to 6 weeks. Retinoids take 8 to 12 weeks. Oral antibiotics take 4 to 8 weeks. Isotretinoin takes 2 to 3 months to show significant improvement, with continued clearing for up to 6 months. If a treatment has not improved your acne after the expected timeframe, talk to your dermatologist about switching.

Can I use multiple acne treatments at the same time?

Yes, but carefully. Benzoyl peroxide and salicylic acid can be used together. Retinoids can be paired with benzoyl peroxide or azelaic acid. Avoid combining retinoids with vitamin C or other potentially irritating ingredients when you are first starting out. Oral antibiotics should always be paired with benzoyl peroxide to prevent resistance. Ask your dermatologist which combinations are safe for your skin.

Will acne come back after I stop treatment?

For most acne treatments, yes—acne often returns when you stop using them because the underlying causes (bacteria, oil production, inflammation) return. Isotretinoin is the exception; most people who complete a course stay clear long-term. For other treatments, many people use a maintenance dose of benzoyl peroxide or a retinoid to keep acne from returning.

Does acne always leave scars?

No. Mild acne rarely scars. Moderate acne may leave temporary marks that fade on their own. Severe acne, especially cystic acne, is more likely to cause permanent scarring. Treating acne early and aggressively, especially with a dermatologist's help, reduces the risk of scarring. If scarring does occur, dermatologists have treatments like laser therapy and chemical peels that can improve appearance.

Can diet or supplements clear acne?

Diet alone does not clear acne, but some evidence suggests that reducing high-glycemic foods and dairy may help some people. Zinc and vitamin D supplements have shown modest benefits in some studies, but they work best alongside medical treatments, not instead of them. Talk to your dermatologist before starting supplements, especially if you are taking other medications.