Nail changes

Overview

Nail changes refer to any difference in the appearance, texture, shape, or colour of your fingernails or toenails. They can be a sign of minor issues like injury or infection, or sometimes point to an underlying health condition.

Very common. Most people will experience some nail changes at some point in their lives.

Anyone can have nail changes, but they are more common in older adults, people with certain skin conditions (like psoriasis or eczema), and those with chronic illnesses such as diabetes.

Symptoms

Common symptoms

• White spots (leukonychia)
• Vertical ridges
• Yellow or discoloured nails
• Brittle or splitting nails
• Thickened nails
• Nail separation from the nail bed (onycholysis)

Symptoms in children

• White spots (often from minor injury)
• Biting or picking nails
• Fungal infections (less common than adults)

Symptoms in older adults

• Thickened, yellow nails
• Longitudinal ridges
• Fungal infections more common
• Brittle nails due to ageing and dryness

Causes

Main causes

• Minor injury (stubbing, crushing)
• Fungal or bacterial infections
• Skin conditions (psoriasis, eczema)
• Systemic illnesses (like thyroid disease, anaemia, diabetes)
• Medications (certain chemotherapy drugs, antimalarials)
• Ageing
• Poor nutrition (lack of iron, biotin, or zinc)

Risk factors

• Frequent hand washing or exposure to water/chemicals
• Wearing tight shoes or sweaty feet for long periods
• Weakened immune system
• Poor circulation (e.g., peripheral artery disease)
• Smoking
• Family history of nail disorders

When to see a doctor

See a doctor urgently if:

• If you notice a new dark band or streak on a nail that you haven't had before, especially if it's growing or changing shape
• If you have pain, redness, swelling, or pus around the nail that gets worse
• If a nail falls off or you have a deep cut or injury to the nail area

Book a routine appointment if:

• If nail changes persist for several weeks without improvement
• If you have multiple nails affected
• If you have other symptoms like fatigue, weight loss, or skin changes

Diagnosis

Your doctor will start by looking at your nails and asking about your medical history, recent injuries, and any other symptoms. They may also check your skin and hair.

Tests that may be done

• Nail clipping for lab analysis (to check for fungus or other infections)
• Blood tests (to check for vitamin deficiencies, thyroid function, or other underlying conditions)
• Rarely, a skin biopsy (small sample of nail or skin) to look for more serious causes

What to expect at your appointment

The appointment is usually quick and painless. If a sample is taken, it may be sent to a lab, and results can take a week or two. Your doctor will explain what they think is going on and whether any treatment is needed.

Treatment

Treatment depends on the cause. Many nail changes don't need any specific treatment and improve on their own. If an underlying condition is found, treating that often helps the nails recover. For infections, specific antifungal or antibacterial treatments (typically applied to the nail or taken orally) may be prescribed.

Self-care at home

• Keep nails clean, dry, and trimmed straight across
• Apply moisturiser to nails and cuticles regularly
• Avoid biting or picking nails
• Wear gloves when washing dishes or using harsh chemicals
• Use gentle nail polish removers without acetone if possible
• Wear properly fitting shoes and change socks daily

Medical treatments

For fungal infections, doctors may prescribe antifungal creams, nail lacquers, or oral medications. For bacterial infections, antibiotics (topical or oral) may be used. If a skin condition like psoriasis is the cause, treatments such as medicated creams, light therapy, or systemic medications may help. Always follow your doctor's advice; do not use over-the-counter products without checking with a healthcare professional.

When is surgery considered?

Surgery is rarely needed for nail changes. It may be considered if a nail is severely ingrown (cutting into the skin) that doesn't respond to other treatments, or if a growth (like a tumour under the nail) needs to be removed. Discuss with your specialist.

Living with this condition

Most people can manage nail changes with simple self-care. Keep an eye on your nails and note any changes. If you have a chronic condition, managing that condition is key to improving nail health.

Lifestyle tips

• Protect your nails from trauma – wear sturdy shoes for activities
• Avoid using nails as tools (opening cans, scratching off stickers)
• Limit exposure to water and harsh chemicals – use gloves
• Don't share nail clippers or files to prevent spreading infection

Diet and exercise

A balanced diet rich in iron, biotin, zinc, and protein can support nail health. Good sources include eggs, nuts, lean meats, beans, and leafy greens. Regular exercise improves circulation, which can help nail growth.

Mental health and emotional wellbeing

Nail changes can sometimes cause embarrassment or worry, especially if they are visible. Most changes are harmless, but if you are concerned, talking to your doctor can provide reassurance. If anxiety about your nails is affecting your daily life, consider speaking with a counsellor or mental health professional.

Prevention

Not all nail changes can be prevented, but you can reduce your risk of injury and infection by keeping nails well-trimmed and clean, wearing proper footwear, and avoiding biting or picking.

Complications

If left untreated

• If a fungal infection is left untreated, it can spread to other nails or skin and cause permanent thickening or deformity.
• An untreated bacterial infection (paronychia) can lead to an abscess or spread deeper into the finger or toe.
• Very rarely, a dark nail stripe can be a sign of melanoma (a type of skin cancer). If not diagnosed early, it can be serious.

Long-term outlook

The outlook for most nail changes is excellent. Many resolve on their own or with simple treatments. Even chronic conditions like fungal infections or psoriasis can be managed effectively with proper medical care. The key is to pay attention to your nails and seek advice if you're unsure. Most changes are not serious, but it's always better to check.

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