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Condition guide · Dermatology

Nail Disorders

Discoloured, thickened, brittle or lifting nails — what nail disorders are, why they happen, and how a consultant dermatologist can find the cause and put a plan in place.

Nail Disorders assessment at Bridge House Clinic
What is nail disorders?

Nail disorders cover any change in the colour, shape, thickness or texture of the fingernails or toenails.

That ranges from a fungal toenail or persistent pitting to lifting, splitting or a dark streak running through the nail. Some nail changes are harmless and simply cosmetic, while others point to a skin condition such as psoriasis, an infection, or occasionally something that needs closer attention. Because so many causes can look alike, the value of an expert assessment is getting the right diagnosis first — then a treatment that actually targets what's going on, rather than guesswork.

01Symptoms

Symptoms of nail disorders.

Nail problems can affect one nail or many, and may build up slowly over months — so changes are easy to ignore until they're well established.

01DiscolourationYellow, white, green or brown changes in the nail — or a dark line or streak running from the base to the tip that hasn't been there before.
02Thickening or crumblingNails that become thick, ragged or crumbly at the edge, often seen in fungal infection or psoriasis of the nail.
03Pitting & ridgesTiny dents across the nail surface, or lengthwise ridges and grooves — frequently linked to psoriasis or eczema.
04Lifting from the nail bedThe nail separating from the skin underneath (onycholysis), leaving a white or hollow-looking gap.
05Brittleness & splittingNails that flake, peel or split easily, sometimes with soreness or swelling around the nail fold.
Sound familiar?Book an assessment with a consultant and get a clear picture — usually the same or next week.
02Causes & risk factors

Why it happens.

A nail change is a sign, not a diagnosis in itself — and the same appearance can have very different causes. These are the most common reasons nails change, and an examination is what tells them apart.

Fungal nail infection (onychomycosis)
Nail psoriasis
Eczema or contact dermatitis
Injury or repeated trauma
Bacterial infection of the nail fold
An underlying medical condition affecting the nails
03When to get it checked

Don't wait for it to settle.

Early assessment helps you get the right treatment sooner. See a specialist if:

I.A new dark line or streak in the nailA pigmented band that appears, widens or spreads onto the surrounding skin should always be examined promptly to be sure of the cause.
II.A single nail that won't settlePersistent thickening, lifting or distortion of one nail in particular is worth assessing rather than treating as a routine infection.
III.Pain, swelling or pus around the nailRedness, throbbing or discharge at the nail fold suggests infection that may need active treatment.
IV.Anti-fungal treatments aren't workingIf pharmacy lacquers or creams haven't helped after several months, it may not be fungal at all — confirming the diagnosis avoids wasted treatment.
V.Nail changes alongside a skin or joint problemPitting or lifting that comes with a rash, scaly skin or sore joints can be part of psoriasis and is worth looking at together.
Book an assessment
Nail Disorders examination by a consultant
Diagnosing nail disorders at Bridge House Clinic
04How it's diagnosed

Diagnosed by examining the nail.

Your consultant dermatologist examines the affected nails and surrounding skin, asks about how the changes came on and looks for clues elsewhere on the skin. Where it helps to confirm the cause — for example to tell fungal infection from psoriasis, or to assess a pigmented streak — a small sample may be taken, such as nail clippings for the lab or a punch biopsy. From there, Dr Alsaadi explains what's going on and agrees a plan with you. Both adults and children can be seen.

05Treatment

How nail disorders is treated.

Treatment follows the diagnosis — the aim is to target the actual cause rather than the appearance alone, then review how the nail responds as it grows out.

01Consultant assessment & diagnosis

An expert examination of the nails and skin to pin down the cause and, where needed, arrange the right test before any treatment begins.

02Sampling to confirm the cause

Where the diagnosis isn't clear from looking, nail sampling or a punch biopsy can distinguish infection, psoriasis and other causes so treatment is aimed correctly.

03Targeted medical treatment

Once the cause is known, a tailored plan is prescribed and agreed — for example treatment for a confirmed fungal infection, or management of nail psoriasis or eczema.

04Follow-up review

Nails grow slowly, so a review checks progress and adjusts the plan as the healthy nail grows through.

Have a changed nail looked at by a consultant dermatologist.An initial dermatology consultation is £200 (£250 for children). Any sampling or treatment depends on what the examination shows, and the fees are confirmed clearly with you before you go ahead.
Why Bridge House
I.
Same or next-week appointments

Seen in days — not months on a list.

II.
Consultant-led care

A named specialist, not a junior — all the way through.

III.
Transparent, fixed pricing

Every price published and confirmed in writing.

IV.
No NHS waiting list

Seen privately, without the wait.

V.
Private insurance accepted

We bill major UK insurers directly.

07FAQ

Common questions.

Can't find your answer? Call us — a real person picks up.

01244 982032
Can I book to have my nail looked at without going through my GP first? +

Yes. You can arrange a consultation with Dr Dalia Alsaadi, our consultant dermatologist, directly — there's no need for a GP letter, and appointments are usually available within days rather than months.

I've been treating it as a fungal nail for ages — why see a dermatologist? +

Several conditions, including nail psoriasis and eczema, look almost identical to a fungal infection, and a dark streak can have its own causes entirely. If pharmacy treatments haven't worked, an examination — and a quick test where needed — confirms what you're actually dealing with so the treatment is the right one.

Will my nail go back to normal? +

It often improves once the cause is treated, but nails grow slowly — a fingernail takes months and a toenail longer — so it can take a while to see a healthy nail grow through. Rather than promise a quick fix, the focus is on treating the underlying cause and reviewing your progress as it grows out.

What will it cost to be seen and assessed? +

The initial dermatology consultation is £200 (£250 for a child). If sampling, such as a punch biopsy, or any treatment is recommended, the cost is explained and agreed with you before anything goes ahead.

Should I be worried about a dark mark or line in my nail? +

Most are harmless, but a new pigmented line — especially one that's widening or spreading onto the skin around the nail — should always be checked promptly. A consultant can examine it and advise whether anything further is needed.

Take the first step

Don't put up with it.

Book an assessment with a consultant and get a clear picture — and a plan.