Why Your Toenails Change Colour (and When to Worry)

Noticing a change in your toenails can be surprising. Yellow, white, brown, or even black nails are common concerns we see in clinic. While some causes are harmless, others may need professional care. Any new or unexplained colour change should be assessed just in case. Understanding toenail discoloration can help you decide when to monitor and when to book an appointment.

Common Causes of Toenail Discoloration

One of the most common causes of nail colour change is a fungal infection, which often makes the nail appear yellow or white and can gradually become thick, brittle, or crumbly over time. Trauma is another common reason, as dropping something on your toe or consistently wearing tight footwear can lead to dark purple or black colouring caused by bruising beneath the nail.

Nail polish can also play a role, particularly when darker shades are worn for long periods without a break, which can sometimes leave surface staining on the nail plate. In addition, certain medical conditions may affect nail appearance. Circulation concerns, diabetes, or psoriasis can all contribute to changes in colour or texture. According to the Canadian Dermatology Association, nail changes may occasionally signal underlying health issues that should not be overlooked.

Although most causes of nail colour change are manageable, dark streaks or rapidly evolving pigmentation can, in rare cases, indicate a more serious condition. Even in the absence of pain, any new or unexplained colour change should be examined to rule out potential concerns and provide reassurance.

When Should You Worry?

You should book an appointment if:

• The nail is painful or swollen

• The colour change spreads or worsens

• The nail becomes thick and difficult to trim

• There is drainage or a foul smell

• A dark streak appears without injury

• The colour change does not improve after a few weeks

Persistent toenail discoloration is not something to ignore. Even if it seems minor, having it assessed provides peace of mind and allows for early treatment if needed.

How a Chiropodist Can Help

At Werkman, Boven & Associates, your chiropodist will assess the cause of toenail discoloration and recommend appropriate treatment. This may include professional nail care, fungal management, footwear advice, or referral to your family doctor if needed.

Healthy nails are part of healthy feet. If you notice a change in colour, book an assessment just in case. Early evaluation is always the safest step.