Tips & Advice From Derriford Therapies

What Your Toenails Could Be Telling You About Your Foot Health

What Your Toenails Could Be Telling You About Your Foot Health

October 02, 2026•11 min read

When was the last time you actually looked at your toenails?

Not just a quick glance while putting your socks on, but a proper look.

For most of us, our toenails don't get much attention until something goes wrong.

Perhaps one turns yellow, starts getting thicker or suddenly develops a strange ridge.

And then, of course, we do what any sensible person would do.

We stare at it suspiciously, wonder how long it's been like that and hope it'll sort itself out.

Sound familiar?

At Derriford Therapies in Plymouth, we see all sorts of toenail changes, from harmless signs of ageing to problems that need a little more attention.

And here's something you might not realise.

Your toenails can sometimes give you useful clues about your foot health and, occasionally, your wider health too.

Let's look at what some of those changes might mean.

What Should Healthy Toenails Look Like?

Healthy toenails are usually fairly smooth, with a pinkish appearance from the skin underneath.

They should grow forwards without digging into the surrounding skin.

But here's the important bit.

Not everyone's toenails look exactly the same.

Some people naturally have thicker nails, while others have nails with slight ridges or different shapes.

Your toenails also change as you get older.

So a nail that doesn't look perfectly smooth or pink isn't automatically unhealthy.

What matters most is noticing changes from what's normal for you.

If a nail suddenly changes colour, shape or thickness, it's worth paying attention.

1. Yellow Toenails: Is It Always a Fungal Infection?

Yellow toenails are one of the most common reasons people become concerned about their nail health.

And understandably so.

Nobody particularly enjoys looking down and discovering that their toenail has decided to change colour without asking permission.

One possible cause is a fungal nail infection.

Fungal infections can cause nails to become:

  • Yellow, white or brown

  • Thicker than usual

  • Brittle or crumbly

  • Uneven or distorted

  • Partly separated from the skin underneath

But fungus isn't the only explanation.

Repeated pressure from shoes, previous injuries and certain skin conditions can also change the colour and appearance of your nails.

Nail polish can sometimes leave temporary staining too.

The important thing to remember is that a yellow toenail doesn't automatically mean you need fungal nail treatment.

If you're unsure what's causing the change, professional assessment can help you avoid spending money on treatments that may not be suitable.

2. Thick Toenails: More Than Just a Sign of Ageing

Have you noticed that your toenails seem to be getting harder to cut?

Perhaps your ordinary nail clippers have started looking rather nervous every time you approach.

Thick toenails become more common as we get older, but ageing isn't the only possible cause.

They can also develop because of:

  • Repeated pressure from footwear

  • Previous nail injuries

  • Fungal infections

  • Certain skin conditions

  • Changes in how the nail grows

Sometimes the nail becomes so thick that it presses against the inside of your shoe.

This can cause discomfort when walking or standing.

And if the nail becomes extremely hard or curved, cutting it yourself can be difficult.

Professional podiatry care can help reduce excess nail thickness and keep troublesome nails more comfortable.

At Derriford Therapies, our HCPC-registered podiatrists can assess thickened nails and provide appropriate nail care.

3. Brittle or Crumbly Toenails: Why Do They Break So Easily?

Some toenails seem determined to split, crack or crumble at the slightest opportunity.

If your nails have become unusually brittle, there could be several reasons.

Repeated trauma, fungal infections and certain skin conditions can all affect nail strength.

Age-related changes may also make nails more brittle.

Occasionally, nail changes can be linked to wider health problems, although you can't diagnose these simply by looking at a toenail.

One important clue is whether the problem affects just one nail or several.

For example, a single damaged nail might be linked to an old injury.

Changes affecting several nails may suggest a different cause.

If your toenails are repeatedly splitting or crumbling, it's worth finding out why rather than simply cutting them shorter and hoping for the best.

4. White Marks on Toenails: Should You Be Worried?

Have you ever spotted a little white mark on your toenail?

You might have heard that white marks mean you're lacking calcium.

It's a popular belief.

But it's usually not true.

Small white spots are often caused by minor damage to the nail as it grows.

You may not even remember the injury.

After all, our toes spend a remarkable amount of time being knocked, squeezed and generally mistreated.

These marks often move forwards as the nail grows and eventually disappear when the nail is trimmed.

However, larger white patches, changes affecting several nails or nails becoming white and crumbly may have other causes.

If you're unsure, it's sensible to get them checked.

5. Dark Toenails: When Should You Take Notice?

A dark toenail can sometimes be caused by bleeding underneath the nail.

This often happens after an injury.

Perhaps you've dropped something on your toe or worn shoes that repeatedly pressed against the nail.

The trapped blood may make the nail look purple, brown or black.

As the nail grows, the discolouration will often gradually move towards the tip.

However, not every dark mark underneath a toenail is caused by an injury.

A new brown or black streak, an unexplained dark patch or pigment spreading onto the surrounding skin should be assessed promptly by a healthcare professional.

Rarely, these changes can be linked to a serious condition such as melanoma, a type of skin cancer.

This doesn't mean every dark toenail is something dangerous.

But it does mean unexplained changes shouldn't be ignored.

6. Ridged Toenails: Are They Normal?

Toenail ridges are another common concern.

Some people notice fine lines running from the base of the nail towards the tip.

These vertical ridges often become more noticeable with age and may be harmless.

However, deep grooves running across the nail can sometimes develop when nail growth has been temporarily interrupted.

This might happen after an illness, injury or other significant stress on the body.

These horizontal grooves are sometimes called Beau's lines.

They often move forwards as the nail grows.

If you notice sudden or unusual changes in several nails, particularly alongside other symptoms, it's worth discussing them with your GP.

7. Toenails That Lift Away From the Skin

Sometimes a toenail begins separating from the skin underneath.

You might notice a white or yellowish gap appearing beneath part of the nail.

This is called onycholysis.

In simple terms, it means the nail is lifting away from the nail bed.

Possible causes include:

  • Repeated pressure or injury

  • Fungal infections

  • Psoriasis and other skin conditions

  • Certain medicines

  • Other medical conditions

The lifted part of the nail won't usually stick back down.

Instead, healthy new nail may gradually grow forwards once the underlying cause has been addressed.

Avoid trying to pull the loose nail away yourself.

Doing so could damage the skin underneath and increase the risk of infection.

8. Curved Toenails: Why Do Some Nails Dig Into the Skin?

Some toenails naturally curve more than others.

But when the sides of a nail press into the surrounding skin, they can become painful.

You may notice tenderness, redness or swelling around the nail edge.

In some cases, the nail may become ingrown.

Ingrown toenails can develop because of:

  • Naturally curved nails

  • Cutting nails too short

  • Tight footwear

  • Previous injuries

  • Repeated pressure on the toes

If the nail continues irritating the skin, the area may become inflamed or infected.

Avoid digging down the sides of a painful nail with scissors or nail clippers.

A podiatrist can assess the nail and advise on appropriate treatment.

If you notice pus, increasing swelling or spreading redness, seek prompt medical advice.

9. Toenails That Grow Very Slowly

Toenails grow much more slowly than fingernails.

In fact, a big toenail can take around 12–18 months to grow out completely.

So if you've damaged a nail and you're waiting for it to look normal again, patience is definitely required.

And possibly quite a lot of it!

Nail growth can slow with age and may also be affected by injury or certain health conditions.

A toenail that has been permanently damaged may never return to its original appearance.

But even when a nail can't be restored to how it once looked, professional care can often help keep it comfortable and manageable.

10. Changes Around Your Toenails Matter Too

It's not just the nail itself that's worth checking.

The skin around your toenails can also provide useful clues.

Look out for:

  • Redness or swelling

  • Tenderness around the nail edges

  • Broken or cracked skin

  • Discharge or bleeding

  • Unusual changes in skin colour

  • Pain when wearing shoes

These symptoms can sometimes be linked to ingrown nails, infections, pressure or other skin problems.

If the area becomes increasingly painful, hot or swollen, it's important to seek medical advice.

And if you have diabetes, poor circulation or reduced feeling in your feet, new nail or skin problems should be assessed promptly.

Can Your Toenails Tell You About Your General Health?

Sometimes, yes.

Certain medical conditions can affect how nails grow, their colour or their texture.

For example, diabetes, psoriasis and some nutritional deficiencies may be associated with nail changes.

But it's important not to jump to conclusions.

Your toenails can't tell you exactly what's wrong with your health.

A thick nail doesn't automatically mean fungus.

A brittle nail doesn't necessarily mean you're lacking vitamins.

And a ridge doesn't mean there's something seriously wrong.

Nail changes are clues, not diagnoses.

If a change suggests a wider health problem, your podiatrist may recommend further assessment by your GP or another healthcare professional.

How Can You Keep Your Toenails Healthy?

Looking after your toenails doesn't need to be complicated.

A few simple habits can make a difference.

Cut Your Toenails Carefully

Trim your nails straight across and avoid cutting too deeply into the corners.

If your nails are very thick or difficult to reach, professional nail cutting may be safer.

Wear Shoes That Fit Properly

Your toes should have enough room to move comfortably.

Shoes that constantly press against your nails can cause repeated damage.

Keep Your Feet Clean and Dry

Wash your feet regularly and dry carefully, especially between your toes.

Don't Ignore Changes

If a nail suddenly changes colour, becomes painful or starts growing differently, make a note of it.

Getting problems assessed early can help prevent unnecessary discomfort.

Avoid DIY Nail Surgery

Please don't try to cut away thick nails with household tools or dig out painful nail corners.

We promise your toenails don't need that sort of enthusiasm!

How Can Derriford Therapies Help With Toenail Problems in Plymouth?

At Derriford Therapies, we believe your toenails deserve proper care.

After all, they're part of your foot health, not simply something to hide under socks.

Our HCPC-registered podiatrists can assess nail changes, discuss possible causes and provide appropriate care.

Depending on your needs, this may include:

Professional nail cutting

Helping patients who struggle to trim their toenails safely.

Thickened nail reduction

Carefully reducing excess nail thickness to improve comfort.

Nail health assessments

Looking at changes in nail colour, shape and texture.

Advice about suspected fungal nails

Helping you understand whether further testing or treatment may be appropriate.

Ingrown toenail care

Assessing painful nail edges and discussing suitable treatment options.

Ongoing routine podiatry

Helping you maintain comfortable, manageable nails as part of your regular foot care.

And if we notice something that needs medical investigation, we'll explain the next steps clearly.

We don't believe in recommending treatments simply for the sake of it.

Your health comes first.

Why Choose Derriford Therapies?

We're a friendly podiatry clinic based in Plymouth, with a team of HCPC-registered professionals who genuinely care about helping patients feel comfortable.

Our clinic offers:

  • Bright, modern treatment rooms

  • Ground-floor entry with disabled access

  • Convenient free parking nearby

  • Simple online booking

  • A welcoming reception team

  • Honest, straightforward advice

Whether you're dealing with a painful toenail or simply need help keeping your nails in good condition, we're here to help.

And please don't feel embarrassed about showing us your feet.

We've seen plenty of troublesome toenails over the years.

Yours won't be the one that makes us run for the door!

Your Toenails Deserve a Little Attention

Your toenails might not be the most exciting part of your body.

They certainly don't get the same attention as your hair, teeth or skin.

But they can tell you when something isn't quite right.

Changes in colour, thickness, shape or texture can sometimes be harmless.

Other times, they may be a sign that your nails need professional care or further investigation.

The important thing is to notice changes and avoid guessing at the cause.

If you're worried about your toenails, struggling to cut them or simply want professional advice, our friendly team at Derriford Therapies is happy to help.

Book a podiatry appointment online or give our reception team a call.

Because your toenails might be small, but keeping them healthy can make a big difference to your comfort.

Derriford Therapies — helping Plymouth put its best foot forward.

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Derriford Therapies

This blog is brought to you by the expert team at Derriford Therapies. We are dedicated to sharing professional insights, podiatry tips, and wellness advice to help you maintain optimal foot health and mobility every step of the way.

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