Acne treatment works by targeting one or more of the four root causes of breakouts: excess oil production, clogged pores, bacteria, and inflammation. The right approach depends on how severe your acne is, what type of breakouts you get, and whether hormones play a role. Most people start with topical products and move to stronger options only if needed.
How Topical Treatments Work
Topical treatments are creams, gels, or washes applied directly to the skin. They’re the first line of defense for mild to moderate acne, and they fall into a few distinct categories based on what they do.
Retinoids (tretinoin and adapalene) are the cornerstone of most acne regimens. They work by speeding up skin cell turnover, which breaks apart the clumps of dead cells that plug pores. Tretinoin has been used for over 30 years and remains a go-to prescription option. Adapalene, a newer-generation retinoid, is available over the counter at lower strengths and performs comparably against both blackheads and inflammatory pimples. Retinoids also reduce inflammation, though they don’t change how much oil your skin produces.
Benzoyl peroxide is an antimicrobial that kills acne-causing bacteria on the skin’s surface and inside pores. It’s particularly useful because bacteria don’t develop resistance to it the way they can with antibiotics. That’s why dermatologists often recommend pairing it with other treatments. You’ll find it in strengths from 2.5% to 10%, and lower concentrations tend to cause less dryness while still being effective.
Salicylic acid is a keratolytic, meaning it dissolves the “glue” holding dead skin cells together inside pores. It’s best for blackheads and whiteheads and is widely available in cleansers, toners, and spot treatments. It’s gentler than retinoids for most people, making it a good starting point if your skin is sensitive.
What the “Retinoid Purge” Actually Is
If you start a retinoid and your skin seems to get worse before it gets better, that’s not a sign the product is failing. When cell turnover speeds up, oil, dead cells, and bacteria that were sitting deep in your pores get pushed to the surface faster than usual, causing a temporary wave of breakouts. For most people this lasts four to six weeks, roughly one full skin cell cycle of about 28 days. Some people with more severe acne or naturally slower cell turnover experience it for up to eight to 12 weeks.
The key distinction: purging happens in areas where you normally break out and clears on its own. If you’re getting irritation or breakouts in entirely new areas, that’s more likely a reaction to the product itself. Starting with a lower concentration or applying every other night can make the adjustment period more manageable.
Oral Medications for Moderate to Severe Acne
When topical treatments alone aren’t enough, oral medications enter the picture. The two main categories are antibiotics and isotretinoin.
Oral antibiotics, typically from the tetracycline family, reduce both bacteria and inflammation from the inside out. They work relatively quickly, but guidelines recommend using them for the shortest time possible and reassessing after three to four months to lower the risk of antibiotic resistance. That’s why antibiotics are almost always paired with a topical retinoid or benzoyl peroxide, which keeps working once the antibiotic course ends.
Isotretinoin is reserved for severe or treatment-resistant acne. It’s the only medication that addresses all four causes of acne simultaneously: it shrinks oil glands, normalizes cell turnover, reduces bacteria, and calms inflammation. A typical course runs five to seven months. Low doses have been shown to be effective while also reducing side effects, though the medication needs to be taken consistently rather than on an intermittent schedule. Because isotretinoin can cause serious birth defects, women of childbearing age must use reliable contraception and participate in a monitoring program throughout treatment.
Hormonal Treatments
Hormonal acne tends to show up along the jawline, chin, and lower cheeks, and it often flares around menstrual cycles. The driving force is androgens, hormones that ramp up oil production. Two types of medication block this process.
Combined oral contraceptive pills contain estrogen and a progestin with anti-androgenic activity, which means they counteract the hormonal signals telling your oil glands to overproduce. They’re effective for women whose acne has a clear hormonal pattern, though it can take two to three months to see meaningful improvement.
Spironolactone is a medication originally developed to treat blood pressure that also blocks androgen receptors in the skin. It can be used alongside oral contraceptives for a stronger anti-androgen effect, or with a hormonal IUD to compensate for the progestin in the device, which can sometimes worsen acne on its own. Spironolactone is only prescribed to women because of its hormonal effects.
Chemical Peels and In-Office Procedures
Chemical peels use concentrated acids to exfoliate the skin more aggressively than anything you’d use at home. A systematic review of randomized controlled trials found that commonly used peels are similarly effective for mild to moderate acne and generally well tolerated. Glycolic acid peels performed significantly better than placebo, with 92% of patients achieving excellent or good improvement compared to 40% in the placebo group.
Among the different acids, salicylic acid combined with mandelic acid stood out, improving comedones by about 90% and total acne scores by 85%, outperforming glycolic acid peels on multiple measures. Trichloroacetic acid and salicylic acid peels performed comparably to each other. Peels are typically done every two weeks over a series of sessions, and they work best as an add-on to a daily topical routine rather than a standalone treatment.
Pulsed dye laser therapy showed similar clinical response rates to chemical peels (about 46% versus 40% improvement), but the laser provided a longer period of remission. Laser treatments tend to be more expensive and are usually considered when peels and topical treatments haven’t been enough.
How Diet Affects Breakouts
The connection between diet and acne is real, though it’s not as simple as “chocolate causes pimples.” Two dietary factors have the strongest evidence behind them: dairy and high-glycemic foods.
A meta-analysis of observational studies found that people with the highest dairy intake were about 2.6 times more likely to have acne compared to those with the lowest intake. Skim milk carried a stronger association (1.8 times the risk) than low-fat milk (1.25 times), and the relationship followed a dose-response pattern, meaning more dairy correlated with more acne. The mechanism likely involves hormones and growth factors naturally present in milk that can stimulate oil production.
High-glycemic foods, those that spike blood sugar quickly like white bread, sugary drinks, and processed snacks, are also linked to acne development. Rapid blood sugar spikes trigger a cascade of insulin and hormone signals that increase oil production and inflammation in the skin. Swapping refined carbohydrates for whole grains, vegetables, and protein-rich foods may help, though diet alone rarely clears acne completely.
Building a Treatment Plan That Works
Acne treatment is almost always layered. A typical approach for mild acne starts with a retinoid and benzoyl peroxide, used at different times of day since benzoyl peroxide can degrade some retinoids. Moderate acne might add an oral antibiotic for three to four months to get things under control, then transition to topical maintenance. Severe or cystic acne often calls for isotretinoin or a combination of hormonal therapy and topicals.
Whatever the plan, consistency matters more than intensity. Most treatments need six to eight weeks before you can fairly judge whether they’re working. Retinoids and hormonal options in particular are slow starters that deliver their best results at the three- to six-month mark. Maintenance is equally important: topical retinoids used alone or with benzoyl peroxide are the standard for keeping acne from returning once it’s cleared.