Dermatology
Topical corticosteroids
Steroid creams and ointments — Anti-inflammatory creams for eczema and other skin conditions — matched in strength to the site and severity.
Education and reference only. This is a plain-language class overview — it deliberately contains no doses. Always check the current Summary of Product Characteristics (SmPC), the BNF and your local formulary before prescribing or administering any medicine.
What it is
Topical corticosteroids are anti-inflammatory creams and ointments used for eczema, dermatitis, psoriasis and other inflammatory skin conditions. They range from mild to very potent.
How it works
Applied to the skin, they calm the local immune and inflammatory response that causes redness, itch and swelling. Potency, the area treated and the skin's thickness all determine how much is absorbed and how strong an effect is needed.
In practice
In practice good results come from matching potency to the job and using enough for long enough rather than too little for too long: a mild steroid for the face and flexures, a stronger one for thick plaques or the palms and soles, applied in the right amount (the "fingertip unit" guide) once or twice daily for a defined course. Most fear of "steroid creams" is overblown when they are used correctly; genuine problems — skin thinning, stretch marks — come from prolonged strong use on delicate skin. Emollients remain the everyday foundation alongside them.
Examples
Practical use
How to take it & use it well
- Apply steroid creams such as hydrocortisone or betamethasone thinly to the affected skin only, using the fingertip unit as a guide to how much to use over a given area.
- Use the potency matched to the site and condition your clinician advised; gentler steroids are used on the face and skin folds, stronger ones on tougher areas if prescribed.
- Apply once or twice daily as directed and rub in gently until it disappears, then wash your hands afterwards unless treating the hands.
- If you also use a moisturiser, leave a gap between applying the emollient and the steroid so each can work properly.
- Use the shortest course needed to settle a flare and follow your clinician's plan for stepping down, rather than using strong steroids continuously.
- Avoid applying potent steroids to the face or under dressings unless specifically advised, as this increases absorption and side effects.
Common uses
- Eczema and dermatitis flares
- Psoriasis (selected sites)
- Other inflammatory and itchy skin conditions
Monitoring
- Response of the skin and length of treatment
- Signs of skin thinning with longer-term use
- Step down potency as the flare settles
Weighing it up
Advantages & disadvantages
Advantages
- They quickly calm inflammation, redness and itch in eczema, dermatitis and other flares.
- A range of potencies allows treatment to be matched to the body site and severity.
- Used correctly in short courses, they are effective and generally safe.
- They act locally on the skin, limiting effects on the rest of the body.
Disadvantages
- Overuse, especially of potent steroids, can thin the skin and cause stretch marks or visible small blood vessels.
- Using the wrong potency on the face or skin folds can cause unwanted effects.
- They treat flares but do not cure the underlying skin condition, which may return.
- Applying too much or under dressings can increase absorption and side effects.
Key safety principles
What to watch for
- Match potency to the site — mild on the face and skin folds, stronger on thick or tough skin.
- Prolonged potent use on delicate skin can cause thinning and stretch marks.
- Use enough to control the flare for a defined course; continue emollients alongside.
Key interactions
What to avoid or check alongside
- Applied to small areas, topical steroids have few medicine interactions, but extensive or prolonged use of potent steroids can lead to more being absorbed.
- Using potent topical steroids over large areas or under occlusive dressings increases absorption and the chance of body-wide steroid effects.
- Combining several steroid products, including inhaled, nasal or oral steroids, adds to the total steroid load.
- Applying a steroid and an emollient at the same moment can dilute the steroid, so they are best spaced apart.
- On skin with possible infection, a steroid alone may worsen it, so your clinician may add or choose an antimicrobial.
Patient & carer advice
- Apply a thin layer to the affected skin as shown (the fingertip-unit guide helps)
- Keep using your moisturiser (emollient) every day
- Used correctly for short courses, these are safe and effective
Answers
Topical corticosteroids: frequently asked questions
What is a fingertip unit?
A fingertip unit is the amount of cream squeezed from the tip of an adult finger to the first crease. It is a simple guide to how much steroid to apply, with each fingertip unit covering roughly an area the size of two adult palms.
Why does the potency need to match the body site?
Skin thickness varies across the body. Gentler steroids are used on delicate areas like the face and skin folds, while stronger ones may be prescribed for thicker skin such as palms or soles. Using too strong a steroid on thin skin risks side effects.
Will steroid creams thin my skin?
Used correctly in short courses, the risk is low. Skin thinning is mainly linked to overuse of potent steroids, prolonged use, or applying strong steroids to delicate areas. Follow your clinician's plan and use the lowest effective strength.
Can I use a moisturiser and a steroid cream together?
Yes, and emollients are an important part of skin care. Apply them at different times, leaving a gap between the moisturiser and the steroid, so the steroid is not diluted and each product can work properly.
How long should I use a steroid cream for?
Use it for the shortest time needed to settle a flare, following your clinician's plan to step down as the skin improves. Strong steroids are not usually meant for continuous long-term daily use without review.
Authoritative sources
Always verify against the source
This overview is for orientation. For doses, interactions, contra-indications and the full monograph, use:
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