Watching your moles properly: the ABCDE rule
With five simple criteria you can spot changes in moles yourself – and know when an appointment makes sense.
The ABCDE rule is a simple memory aid for recognising conspicuous moles. It does not replace a medical examination, but it helps you notice changes early.
The five criteria
- A for Asymmetry – the two halves of the mole look different
- B for Border – the edge is blurred, ragged or irregular
- C for Colour – several shades in one mole, such as brown, black, reddish
- D for Diameter – larger than about 5 mm or clearly growing
- E for Evolution – the mole changes over weeks and months
The most important criterion is change
A mole that has looked the same for years is usually harmless. You should pay attention when something changes – in size, colour, shape or surface.
The „ugly duckling“
Also watch out for moles that clearly differ from all the others. Most people have their own „mole type“; a mole that stands out deserves a check.
How to do a self-check
Take your time once a month in good light. Work systematically: face and scalp, neck and shoulders, arms including the backs and palms of the hands, chest and abdomen, back with a hand mirror or help, legs, soles of the feet and between the toes.
When in doubt, better once too often
A short check brings clarity and takes little time. If you are unsure, make an appointment – that is always the better decision than waiting.