Eczema and psoriasis are two of the most common long-term skin conditions seen in UK general practice. They can look similar to the untrained eye — red, scaly, uncomfortable patches — but they behave differently, and the treatment logic differs too. The reassuring part is that for most people the mainstay of care is topical: creams, ointments, gels and sprays applied to the skin rather than tablets. This article explains how the two conditions differ, why emollients matter so much, how clinicians choose between the topical options, and when it is time to step up to specialist care.
How eczema and psoriasis differ
Eczema — atopic dermatitis is the most common form — is fundamentally a problem of a leaky, inflamed skin barrier. The skin loses water easily, becomes dry and itchy, and is prone to flares triggered by irritants, allergens, heat, sweat, infection and stress. It often appears in the creases of the elbows and knees, on the hands, and on the face and neck, and the itch is usually the dominant symptom. Scratching damages the barrier further, which can set up an itch-scratch cycle that keeps a flare going.
Psoriasis is an immune-driven condition in which skin cells are produced far too quickly, building up into well-defined, silvery-scaled plaques. These classically appear on the elbows, knees, lower back and scalp, and the edges tend to be sharper and the scale thicker than in eczema. Psoriasis can also affect the nails, causing pitting or lifting, and in some people the joints. Both conditions tend to come and go over years — they are long-term conditions that are controlled rather than eliminated — and the aim of treatment is clear, comfortable skin for as much of the time as possible, not a single course that resolves the problem forever.
Why emollients come first
Whatever else is prescribed, emollients — medical moisturisers — are the foundation of long-term skin care in both conditions. They restore the skin barrier, reduce water loss, soften scale, ease itch and can lower how often flares happen. In eczema especially, generous and frequent use — often several times a day, and continued even when the skin looks settled — does much of the heavy lifting and can reduce how much steroid is needed over a year.
There is no single correct emollient. Lighter lotions, richer creams and greasy ointments all have a place, and the most useful one is simply the product you will actually use often enough. Many people use a lighter cream in the daytime and a heavier ointment overnight. Soap and detergent-based washes strip the barrier further, so a soap substitute or emollient wash is usually recommended alongside. A practical tip is to apply emollient in smooth downward strokes rather than rubbing it in hard, and to leave a gap of a few minutes before applying any active treatment on top.
Topical corticosteroids: matching potency to the site
When skin is actively inflamed, topical corticosteroids are the workhorse treatment for flares. The key clinical principle, set out in NICE guidance, is that potency is matched to both the severity of the flare and the body site being treated. Facial and flexural skin is thin and absorbs steroid readily, so milder preparations such as hydrocortisone are generally used there. Thicker skin on the trunk and limbs, or stubborn plaques, may need a moderately potent option such as Eumovate, a potent one such as Betnovate, or occasionally a very potent steroid such as Dermovate for short, closely supervised courses.
Used correctly — the right strength, the right amount, for a defined period — topical steroids are effective and safe, and they are usually applied once or twice a day to active areas until the flare settles. Used indiscriminately at high potency on delicate skin, they can thin the skin over time or, if stopped very abruptly after prolonged strong use, cause a rebound flare. That is exactly why the choice is individualised and why a clinician decides what is appropriate for your skin, rather than reaching for the strongest option by default. The fingertip unit — the amount squeezed from the fingertip to the first crease — is a simple way to judge how much to apply to a given area, and your clinician or pharmacist can show you.
Calcineurin inhibitors and vitamin D analogues
For eczema, particularly on the face, eyelids and other delicate areas where you want to limit steroid use, topical calcineurin inhibitors — tacrolimus and pimecrolimus — are a recognised steroid-sparing option. They calm inflammation through a different mechanism and can be helpful for maintenance and for sites where thinning is a concern. Some people notice a brief tingling or burning when they first start; this usually settles with continued use.
For plaque psoriasis, vitamin D analogues are commonly used and are a first-line topical option. Dovonex (calcipotriol) slows the overproduction of skin cells and reduces scale. It is frequently combined with a corticosteroid — products such as Dovobet and Enstilar pair a vitamin D analogue with a steroid in one preparation, which can improve results and make a routine easier to stick to. Coal tar preparations and scalp-specific products also have a role, especially for scalp psoriasis, where a different formulation is often needed to reach the skin through the hair. Treatment plans are individualised — not all patients respond in the same way, and it is normal to trial one approach, review it, and adjust.
Managing flares and everyday triggers
Alongside active treatment, day-to-day trigger management makes a real difference, especially in eczema. Common aggravators include soaps and detergents, wool and rough fabrics, low humidity and central heating in winter, sweat and heat, and stress. Identifying and reducing your own triggers — for example switching to fragrance-free products, wearing softer fabrics and managing overheating at night — can lengthen the settled periods between flares.
Infection is worth watching for. Eczema that becomes hot, weepy, crusted with golden scabs or rapidly worse may be infected and can need a different treatment, so it should be reviewed rather than simply treated with more steroid. In psoriasis, some people find flares are set off by throat infections, certain medicines, skin injury or stress. None of this is your fault, but recognising the pattern helps you and your clinician stay a step ahead, and keeping a short note of what preceded a flare can make those triggers easier to spot over time.
It also helps to keep expectations realistic. Both conditions naturally wax and wane, so a settled spell is not proof that treatment can be abandoned, and a flare is not a sign of failure. The most durable results usually come from a steady background routine — emollients and, in psoriasis, maintenance topical treatment — punctuated by stepping treatment up during flares and back down as the skin settles.
When topical treatment isn't enough
Topical treatment manages the large majority of eczema and mild-to-moderate psoriasis, but it is not the whole picture. Specialist referral is appropriate when disease is severe, extensive or unstable, when it is not responding to well-used topical treatment, or when it is seriously affecting sleep, work or mental health. Dermatology teams can offer phototherapy and, in psoriasis, systemic or biologic treatments; widespread or difficult eczema may also need a specialist assessment and, sometimes, allergy or patch testing.
Some situations need prompter attention: a sudden, widespread flare of psoriasis with fever, skin that is extensively infected, or eczema that is not settling despite correct treatment all warrant review. Psoriasis affecting the joints — psoriatic arthritis — also needs medical assessment, as early treatment protects the joints. You can read more on related skin conditions in our acne treatment guide or browse the full Skin & Hair category.
Working with your Farmeci clinician
A consultation typically covers where your skin is affected, how long flares last, what you have already tried and how the condition affects your day-to-day life. From there a UK-registered clinician can advise on an emollient routine, the right steroid potency for each area, and whether a vitamin D analogue or calcineurin inhibitor fits your situation — or whether specialist input is the sensible next step. The aim is a realistic, individualised plan you can maintain, not a single fix, and your clinician will advise based on your individual circumstances.