A topical corticosteroid (skin)
Betamethasone
A potent topical steroid cream or ointment used for inflamed skin conditions such as eczema.
What is Betamethasone?
Betamethasone is a potent topical corticosteroid applied to the skin to calm inflammation in conditions such as eczema and psoriasis. It reduces redness, swelling and itching during flare-ups, and is applied thinly for short periods rather than continuously. Because it is potent, it is generally kept off the face and skin folds unless a clinician advises otherwise.
Education and reference only. This is a plain-language guide to Betamethasone — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Betamethasone is a potent topical corticosteroid — a steroid applied directly to the skin — used widely in UK practice for inflammatory skin conditions such as eczema, dermatitis and psoriasis. It comes as creams and ointments (and scalp preparations), and as combination products with an antibiotic or antifungal where infection is also present. Its job is to bring an inflamed, itchy flare-up under control quickly, after which treatment is usually stepped down rather than continued indefinitely.
How it works
Betamethasone calms the overactive immune response in the skin that causes redness, swelling, heat and itch. It switches down the inflammatory signals in skin cells, so the flare settles and the skin barrier can recover. As a potent steroid it acts strongly, which is why it is used in short, controlled bursts rather than continuously.
What it treats
Conditions Betamethasone is used for
Practical use
How to take Betamethasone
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Apply a thin layer to the affected skin only, using a fingertip unit as a guide so you do not use too much.
- Use it once or twice a day as directed, for the short period advised, rather than continuously.
- Step down to a milder steroid or to a moisturiser as the skin improves, instead of stopping abruptly during a bad flare.
- Generally avoid the face, eyelids and skin folds unless a clinician has specifically advised it, as these areas absorb more.
- Wash your hands after applying, unless your hands are the area being treated, and continue regular moisturiser between steroid use.
Weighing it up
Advantages & disadvantages of Betamethasone
Advantages
- Potent and effective at settling moderate to severe inflamed, itchy skin flares quickly.
- Available as creams, ointments and scalp preparations, and in combinations with an antibiotic or antifungal where needed.
- Allows treatment to be stepped down to milder options once a flare is controlled.
Disadvantages
- As a potent steroid, prolonged or excessive use can thin the skin and cause stretch marks (striae), especially on the face and in skin folds.
- Generally unsuitable for unsupervised long-term use or for large areas of broken skin.
- Can mask or worsen a skin infection if used without recognising one, so infected skin needs assessment.
Practical use
Good to know
It is applied as a thin layer to the affected skin only, often measured by the fingertip unit to avoid using too much. It is a potent steroid, so it is normally used for short periods and then stepped down to a milder option or to a moisturiser as the skin improves. Potent steroids like this are generally kept away from the face and skin folds (such as the groin and armpits) unless specifically advised, as these areas absorb more and are more prone to thinning.
Who should not take it / use with caution
- Anyone with untreated skin infection (bacterial, viral or fungal) at the site, unless it is being treated alongside.
- Avoid on the face, eyelids and skin folds for routine use unless specifically advised, and avoid in conditions such as rosacea and acne where steroids can worsen the skin.
- Used with particular care in young children and over large areas, where more steroid is absorbed.
Monitoring
- Mainly clinical — reviewing the skin's response and watching for thinning, stretch marks or signs of infection.
- Regular review if it is needed often or over long periods, to step down to the mildest effective treatment.
- Closer review when used in children or over large areas.
Side effects
- Burning, stinging or itching when first applied, which usually settles.
- With prolonged or heavy use, thinning of the skin, stretch marks, visible small blood vessels, or easy bruising at the treated site.
- Rarely, spread or flare of a hidden skin infection, or skin changes around the mouth; very rarely, effects from the steroid being absorbed when large amounts are used over long periods.
Key interactions
- Few important interactions, as little is absorbed when used correctly on limited areas.
- Covering the treated skin with dressings, or treating large or broken areas, increases absorption and the chance of side effects.
- Used alongside, not instead of, regular moisturisers, which should be applied at separate times.
Available as: Creams, ointments, and scalp applications; also combined with an antibiotic or antifungal in some products.
Answers
Betamethasone: frequently asked questions
How much betamethasone should I put on?
Apply a thin layer to the affected skin only. The fingertip unit — the amount squeezed from the fingertip to the first crease — is a useful guide to how far one measure should spread, helping you avoid using too much of this potent steroid.
Can I use betamethasone on my face?
Generally no, unless a clinician has specifically advised it. The face and skin folds absorb more and are more prone to thinning and other steroid effects, so potent steroids like betamethasone are usually kept off these areas and a milder option is used instead.
Will betamethasone thin my skin?
Used correctly in short, controlled bursts it is unlikely to. The risk of skin thinning and stretch marks rises with prolonged or excessive use, particularly on the face and in skin folds, which is why it is applied thinly and stepped down as the skin improves.
Should I stop suddenly once my skin clears?
It is usually better to step down rather than stop abruptly during a bad flare — for example moving to a milder steroid or to a moisturiser as the skin settles. Your prescriber can advise on the safest way to taper for your condition.
What is the difference between betamethasone, Betnovate and Diprosone?
They are the same active ingredient — betamethasone is the generic name, while Betnovate and Diprosone are brand names for betamethasone skin preparations. Generic betamethasone contains the identical active ingredient.
The wider class
About Topical corticosteroids
Betamethasone belongs to the topical corticosteroids class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF: Betamethasone (topical).
- NICE CKS: Betamethasone for skin.
- NICE guidance on topical corticosteroids in eczema.
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