Teenage
Acne

Teenage acne is a common skin condition that develops during puberty, when hormonal changes increase oil production and make pores more likely to become blocked.

How acne develops in teenage skin

• Acne begins in the hair follicles, which are small openings in the skin connected to oil-producing glands.

• During puberty, these glands produce more sebum (oil) than the skin needs.

• Excess oil mixes with dead skin cells, forming a plug that blocks the pore.

• This environment allows naturally occurring bacteria to multiply, leading to inflammation and visible spots.

• Depending on the severity of the blockage, this can result in blackheads, whiteheads, or inflamed lesions.

The role of hormones during puberty

• Hormonal changes, particularly increased androgens such as testosterone, stimulate the sebaceous glands.

• This affects both males and females, even though hormone patterns differ.

• Acne often begins between the ages of 11 and 14, but timing varies.

• Breakouts may fluctuate as hormone levels change, which is why acne can appear unpredictable.

Difference between normal breakouts and acne

• Occasional spots can happen at any age and usually resolve quickly.

• Acne is typically persistent, with repeated breakouts in the same areas.

• Signs of acne include:

  • Ongoing blackheads or whiteheads

  • Inflamed, red spots

  • Deeper or painful lesions

• Acne may affect the face, chest, back, or shoulders, often in patterns linked to oil production.

Teenage acne develops as a natural response to hormonal changes, rather than anything related to hygiene or lifestyle alone. Understanding this helps set realistic expectations and supports a more structured approach to treatment.

Understanding the different types of teenage acne helps clarify why some breakouts respond quickly to treatment, while others require a more structured approach.

Comedonal acne (blackheads and whiteheads)

• This form of acne is non-inflammatory, meaning there is no redness or swelling.

• It develops when pores become blocked with oil and dead skin cells.

• Blackheads remain open at the surface and appear dark due to oxidation, not dirt.

• Whiteheads are closed and appear as small, pale bumps under the skin.

• Typically found on the forehead, nose, and chin.

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• Common concern addressed: “Why do I have bumps but no inflamed spots?”

Inflammatory acne (papules and pustules)

• Occurs when blocked pores become inflamed due to bacterial activity.

• Papules are small, red, raised spots without visible pus.

• Pustules contain pus and often appear with a white or yellow centre.

• These lesions may feel tender and can persist longer than comedonal acne.

• More common across the cheeks, jawline, chest, and back.

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• Common concern addressed: “Why do my spots become red and sore?”

Nodular and cystic acne

• This is a more severe form of acne, involving deeper inflammation within the skin.

• Nodules are firm, painful lumps beneath the surface.

• Cysts are larger, pus-filled lesions that may remain for weeks.

• Higher risk of scarring and long-term skin changes if not managed early.

• Often requires medical assessment and prescription treatment.

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• Common concern addressed: “When should I seek professional advice?”

Recognising the type of acne present is an important step in choosing appropriate treatment and avoiding unnecessary trial and error.

Teenage acne is primarily driven by internal changes, but certain external factors can influence its severity or persistence.

Hormones and natural oil production

• During puberty, increased hormone levels stimulate the sebaceous glands to produce more oil.

• This excess oil makes pores more likely to become blocked and inflamed.

• Hormonal fluctuations can lead to cycles of breakouts, even when skincare is consistent.

• This process is largely biological and not directly controllable, which is important to recognise early.

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• Common concern addressed: “Is there anything I can do to stop hormonal acne?”

Skincare and cosmetic products

• Some products can block pores, particularly those labelled as oil-based or comedogenic.

• Over-cleansing or using harsh scrubs can disrupt the skin barrier, increasing irritation.

• Using multiple active ingredients at once may worsen redness and sensitivity.

• Choosing non-comedogenic, fragrance-free products can help reduce unnecessary irritation.

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• Common concern addressed: “Am I making my acne worse with the products I use?”

Lifestyle influences (diet, stress, and environment)

• There is limited evidence linking specific foods directly to acne, although high glycaemic diets may play a role in some individuals.

• Stress can influence hormonal activity, which may contribute to flare-ups.

• Sweat, friction from clothing, and sports equipment can trap oil and bacteria against the skin, particularly on the back and shoulders.

• Environmental factors, such as humidity or occlusive clothing, can also contribute.

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• Common concern addressed: “Do I need to change my diet or lifestyle?”

While teenage acne cannot always be prevented, understanding common triggers can help reduce unnecessary aggravation and support more consistent skin management.

Teenage acne is usually straightforward to assess, but understanding when to seek help can make a meaningful difference to both outcomes and long-term skin health.

How GPs and clinicians assess acne

• Acne is diagnosed through a visual examination of the skin, rather than tests or scans.

• Clinicians look at:

  • The type of lesions present, such as blackheads, inflamed spots, or deeper nodules

  • The distribution of acne, for example, the face, chest, or back

  • The severity and persistence over time

• Acne is typically classified as mild, moderate, or severe, which helps guide treatment decisions.

• This assessment also considers whether there are early signs of scarring or pigmentation changes.

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• Common concern addressed: “Will I need tests or investigations?”

When acne needs medical treatment

• Many cases of mild acne can be managed with pharmacy advice and consistent skincare.

• Medical treatment is usually recommended when:

  • Acne is persistent or worsening despite over-the-counter options

  • There are painful or deep lesions, such as nodules or cysts

  • Acne is starting to leave marks or scars

  • Breakouts are affecting confidence or wellbeing

• Early intervention can reduce the risk of long-term skin changes.

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• Common concern addressed: “Is my acne serious enough to see a doctor?”

Referral to dermatology services

• Referral may be considered if:

  • Acne does not respond to standard treatments

  • There is moderate to severe acne, particularly with scarring risk

  • There is diagnostic uncertainty or an underlying medical factor

• In the UK, this may involve:

  • NHS referral to a dermatologist-led service

  • Accessing a private clinic for earlier assessment and broader treatment options

• Specialist care allows access to treatments such as oral isotretinoin, which require careful supervision.

• Guidance emphasises that treatment should be reviewed over structured periods, often around 12 weeks, to assess response and adjust if needed.

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• Common concern addressed: “What happens if standard treatments do not work?”

Assessment of teenage acne is based on visible signs and severity, with referral considered when acne is persistent, severe, or affecting wellbeing.

Teenage acne treatment options in the UK vary depending on severity, with most approaches following a structured pathway that balances effectiveness with safety.

Over-the-counter treatments and skincare

• Often, the first step is for mild acne or early breakouts.

• Common options include:

  • Benzoyl peroxide, which reduces bacteria and inflammation

  • Gentle, non-comedogenic cleansers and moisturisers

• Products should be used consistently, usually once or twice daily, depending on tolerance.

• Harsh or overly complex routines can increase irritation and reduce adherence.

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• Common concern addressed: “Where should I start with treatment?”

Prescription treatments from a GP

• Recommended when acne is persistent or moderate in severity.

• Options may include:

  • Topical retinoids, which help prevent blocked pores

  • Combination treatments with benzoyl peroxide and antibiotics

• Treatment is usually prescribed as a 12-week course, with review at the end of this period.

• Visible improvement often takes 6 to 8 weeks, so early patience is important.

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• Common concern addressed: “How long before treatment starts working?”

Treatments for moderate to severe acne

• For more widespread or persistent acne, oral treatments may be considered.

• These can include:

  • Oral antibiotics, used alongside topical treatments

  • Hormonal treatments in selected cases

  • Oral isotretinoin, reserved for severe or treatment-resistant acne

• These options require clinical supervision, with careful discussion of risks and suitability.

• Treatment choice depends on factors such as age, severity, and previous response.

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• Common concern addressed: “Are stronger treatments safe and when are they needed?”

Professional clinic treatments

• It may be used alongside medical treatment or when additional support is needed.

• Options available in UK clinics include:

  • Chemical peels, which help exfoliate and reduce blocked pores

  • Light-based therapies, targeting inflammation and bacteria

  • Ultrasound-based treatments such as LDM Triple, which support skin repair and barrier function

• These treatments are typically adjunctive, meaning they support rather than replace medical care.

• Suitability depends on the type of acne, skin sensitivity, and the overall treatment plan.

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• Common concern addressed: “Do clinic treatments offer real benefits or are they optional?”

Treatment for teenage acne is most effective when matched to severity and followed consistently over time, rather than changed frequently.

Understanding how long acne treatment takes helps set realistic expectations and reduces the risk of stopping too early.

Typical acne treatment timelines

• Most treatments take 6 to 8 weeks for noticeable improvement to begin.

• A full assessment is usually made around 12 weeks, which is why many treatments are prescribed in structured courses.

• Early stages may show subtle changes, such as fewer new spots rather than immediate clearing.

• More significant improvement often develops gradually over time.

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• Common concern addressed: “Why is my skin not improving yet?”

Managing initial flare-ups or irritation

• Some treatments, particularly retinoids, can cause temporary irritation or dryness.

• A short-term increase in breakouts may occur as the skin adjusts.

• This does not necessarily mean the treatment is unsuitable, but it may need:

  • Gradual introduction

  • Adjusted frequency

  • Supportive skincare to protect the skin barrier

• Persistent or severe irritation should be reviewed with a clinician.

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• Common concern addressed: “Is my treatment making my acne worse?”

Importance of consistency and follow-up

• Consistent use is essential, as irregular application can reduce effectiveness.

• Stopping treatment early may lead to recurrence of breakouts.

• Follow-up allows:

  • Adjustment of treatment strength or type

  • Monitoring for side effects

  • Consideration of alternative options if needed

• Treatment plans are often stepped or combined, depending on response.

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• Common concern addressed: “Can I stop treatment once my skin improves?”

Acne treatment works gradually, with improvement building over weeks rather than days, making consistency and review an important part of the process.

Preventing acne scars is a key part of managing teenage acne, as early and consistent treatment can reduce the likelihood of lasting skin changes.

Why acne scars develop

• Scarring occurs when inflammation damages deeper layers of the skin.

• More severe acne, such as nodules and cysts, carries a higher risk.

• Delayed or ineffective treatment can allow inflammation to persist, increasing this risk.

• Repeated breakouts in the same area may also contribute to long-term changes.

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• Common concern addressed: “Will my acne leave permanent marks?”

Practical steps to reduce scarring risk

• Avoid picking or squeezing spots, as this increases inflammation and skin trauma.

• Start appropriate treatment early to reduce the duration of active acne.

• Use non-comedogenic skincare to support the skin barrier.

• Apply daily sun protection, as UV exposure can worsen post-acne pigmentation.

• Follow treatment plans consistently to reduce repeated flare-ups.

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• Common concern addressed: “What can I do now to protect my skin?”

When to treat acne scars

• Some marks, such as post-inflammatory pigmentation, may fade over time.

• True scarring, including indentations or raised areas, may require treatment.

• Options in clinical settings can include:

  • Microneedling

  • Chemical peels

  • Laser or energy-based treatments

• Treatment is usually considered once acne is stable and under control.

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• Common concern addressed: “Can scars be treated later if they develop?”

Reducing inflammation early and avoiding unnecessary skin trauma are the most effective ways to lower the risk of acne scarring.