Few skin conditions carry as much emotional weight as acne. It can affect confidence, social behavior, and quality of life - and because it is so visible and common, it has generated an enormous amount of advice, products, and social media content, much of which is inaccurate or incomplete.
Getting the right treatment for acne starts with understanding what is actually causing it. Here, I want to address some of the most common beliefs patients bring to their first consultation.
Myth 1: Acne Is Caused by Dirty Skin
This is the most persistent and most damaging myth in acne care. It leads patients to over-cleanse, use harsh scrubs, and believe that their breakouts are the result of insufficient hygiene. They are not.
Acne is a multi-factor condition involving sebum production, bacterial presence (specifically C. acnes), follicular keratin buildup, and inflammation. None of these processes are meaningfully caused by surface-level dirt or poor hygiene. In fact, over-washing and aggressive cleansing can worsen acne by disrupting the skin barrier, increasing inflammation, and triggering more sebum production as a compensatory response.
Gentle, twice-daily cleansing with a mild, non-comedogenic cleanser is appropriate for acne-prone skin. Scrubbing, astringent toners, and multiple daily washes are counterproductive.
Myth 2: Food Causes Acne
The relationship between diet and acne is more nuanced than popular advice suggests. The evidence does support a modest link between high-glycaemic index foods and acne severity in some patients. Dairy - particularly skimmed milk - has also shown associations with acne in certain studies, though the mechanism is not fully established.
What is not supported: the idea that chocolate, fried food, or spicy food inherently causes acne. These associations are mostly anecdotal. Some individuals do notice flares with specific foods, and tracking those patterns can be useful for those patients. But dietary restriction as a treatment strategy has limited evidence and should not replace clinical management.
Myth 3: Toothpaste Clears Spots Overnight
This is a home remedy that continues to circulate despite being reliably unhelpful. Toothpaste contains ingredients - fluoride, sodium lauryl sulfate, baking soda, fragrances - that are irritating to facial skin and can cause redness, dryness, and contact dermatitis. It does not meaningfully reduce a spot, and can make the surrounding skin worse.
Myth 4: Moisturizer Makes Acne Worse
As discussed in other articles, this belief leads many acne patients to skip moisturizer entirely and end up with dehydrated, reactive, inflamed skin that is actually harder to treat. Many acne treatments - topical retinoids, benzoyl peroxide, antibiotics - are drying by nature and require barrier support.
The right moisturizer for acne-prone skin is lightweight, non-comedogenic, and free from heavy oils and occlusive ingredients. But skipping it entirely is not the solution.
Myth 5: Acne Is Just a Teenage Problem
Adult acne is common, and its prevalence has been increasing. Women in particular experience hormonal acne in their 20s, 30s, and 40s - driven by fluctuations in androgens, stress hormones, and factors like polycystic ovary syndrome (PCOS). Adult acne can behave differently to teenage acne: it tends to concentrate around the lower face and jawline, is often cyclical, and may respond less well to the same treatments used for adolescent acne.
The approach to adult acne needs to reflect its hormonal and inflammatory drivers, which may include oral treatments alongside topical management.
What Actually Works
Effective acne treatment is evidence-based and matched to the type and severity of the condition. Clinically supported approaches include:
- Topical retinoids: Highly effective for comedonal and inflammatory acne. Require consistent use and sun protection. The gold standard for long-term management alongside SPF.
- Benzoyl peroxide: Antimicrobial, reduces C. acnes load. Available OTC and in prescription-strength formulations. Can be drying - barrier support is important.
- Topical antibiotics: Effective for inflammatory acne, typically prescribed with benzoyl peroxide to reduce antibiotic resistance development.
- Oral antibiotics: For moderate to severe inflammatory acne. Used for a defined course, not long-term, given resistance concerns.
- Hormonal treatments: For women with hormonal acne. Certain oral contraceptives and spironolactone have significant evidence for reducing androgen-driven breakouts.
- Oral isotretinoin: The most effective treatment available for severe or recalcitrant acne. Requires careful monitoring and is managed under specialist supervision.
- In-clinic treatments: Chemical peels, extraction, photodynamic therapy, and RF microneedling can complement topical treatment and address scarring.
The Post-Acne Problem
Acne itself is one clinical challenge. The marks it leaves behind - post-inflammatory hyperpigmentation (PIH) and atrophic scarring - are often a separate concern that outlasts the acne and requires distinct treatment. This is why treating acne promptly and effectively matters: the longer active acne continues, the more significant the residual damage is likely to be.
If you have active acne and are seeing dark marks or scarring developing, this is a signal that the current management is not adequate and that a dermatology consultation would be well-timed.