When to consult a dermatologist

Skin, hair and nail problems that need a specialist, what can wait, and the one symptom never to sit on.

Dermatologists diagnose and treat conditions of the skin, hair and nails. Many problems resolve in one or two consultations; some, like eczema or psoriasis, are managed over years.

See a dermatologist promptly for

• A mole or spot that is changing in size, shape or colour, bleeding, or looks different from the others.
• A sore that has not healed in four weeks.
• A rash with fever, blistering, or that spreads rapidly.

Book a routine consultation for

• Acne that has not responded to over-the-counter treatment after eight to twelve weeks.
• Persistent itching, scaling, dryness or discolouration.
• Sudden or patchy hair loss, or nail changes.
• Recurring fungal or bacterial skin infections.
• Any skin condition affecting a child that is not settling.

Medical versus cosmetic

Some dermatology practices offer cosmetic procedures alongside medical care and some do not. Each profile on this site lists the services the doctor actually provides, drawn from a controlled list, so you can see before you book.

What to bring

Photographs of the problem taken in daylight, especially if it comes and goes. A list of everything you have already tried, including creams and home remedies. Your medicine list — several common medicines cause skin reactions.

General guidance, not advice about your situation. Not for emergencies — call 108. Errors can be reported through the corrections process.