Understanding the ABCDE Rule of Melanoma: A Guide to Checking Your Skin
Blog Health News 7th May 2026 Enquiries & appointments
A small check that can make a big difference
May is Skin Cancer Awareness Month, and acts as a time to remind ourselves to pay attention to our skin. If you have noticed a new or changing mole, having the right information and guidance can help you feel more confident and in control. The ABCDE Rule is a simple guide designed to support you in recognising potential signs of Melanoma.
Why early detection matters
Skin cancer is one of the most common forms of cancer, and melanoma can sometimes develop without obvious symptoms at first. However, checking your skin regularly can help detect any changes early.
When melanoma is identified early:
• Treatment is simpler and often less invasive
• You’re more likely to have a positive outcome
• There is a better chance of a full recovery
The ABCDE rule – what to look for
The ABCDE rule is a helpful way to guide your skin checks. It doesn’t mean that something is definitely wrong, but it can highlight when it may be worth seeking professional advice.
A is for Asymmetry
If you imagine drawing a line through the mole, the two halves may look different. Benign (non-cancerous) moles are usually symmetrical, so uneven shapes can be a sign to monitor more closely.
B is for Border
Look at the edges of the mole. Are they smooth and clearly defined? Or do they appear irregular, scalloped, or blurred?
C is for Colour
Healthy moles are often one consistent colour. Variations in colour – such as different shades of brown, black, or even areas of red, white, or blue – may need attention.
D is for Diameter
Many melanomas are larger than 6mm (around the size of a pencil eraser) but it’s important to know that some can be smaller, particularly in the early stages, and any noticeable growth should be checked.
E is for Evolving
This is one of the most important signs. Has the mole changed in size, shape, colour, or texture? Are there new symptoms such as itching, bleeding, or crusting?
Any change over time is worth paying attention to.
Other signs to be aware of
In addition to the ABCDE guide, it can be helpful to notice:
• A new mole or dark spot that wasn’t there before
• A mole that bleeds, or feels different
• Changes in texture, such as becoming raised or rough
• Itching or tenderness in a mole
Melanoma can appear anywhere on the body, including areas not always exposed to the sun.
When to seek advice
If you notice anything new, changing, or unusual, it’s always okay to seek reassurance. Most changes will not be serious but getting them assessed can give you clarity and peace of mind. As a general guide, it’s recommended to speak to a healthcare professional if you have any concerns about your skin.
Supporting You at KIMS Hospital
At KIMS Hospital, our dermatology team understands that concerns about your skin can feel worrying.
We offer:
• Thorough mole assessments
• Expert, compassionate care
• Support and guidance at every step
If you’ve noticed a change or simply want reassurance:
Learn more or book a dermatology appointment
Source: https://www.melanomauk.org.uk/skin-checks-and-abcde
Article produced by
KIMS Hospital