A mole that has been there for years may be completely harmless. A mole that is changing, bleeding, crusting or simply looks unlike the rest deserves timely attention. Mole checks provide a focused clinical assessment of suspicious or changing skin lesions, helping you move from uncertainty to a clear next step.
Most moles are benign, and many people have dozens of them. The purpose of an assessment is not to cause alarm. It is to identify whether a mole appears reassuring, needs monitoring, or requires further investigation.
What happens during mole checks?
A mole check is a clinical examination of one or more moles, pigmented patches or skin lesions that concern you. The clinician will ask when you first noticed the lesion, whether it has changed, and whether it causes symptoms such as itching, pain or bleeding. Your personal and family history of skin cancer, sun exposure and previous sunburn may also be relevant.
The mole is then examined closely. Dermatology clinicians commonly use a dermatoscope, a handheld instrument with magnification and light that allows them to assess structures and patterns beneath the skin surface that cannot be seen clearly with the naked eye.
This examination helps the clinician decide whether the mole looks benign, whether photographs or follow-up review would be useful, or whether you should be referred for removal or biopsy. A careful assessment can be reassuring, but it also avoids dismissing a lesion that needs a more urgent pathway.
Changes in a mole that should be assessed
The ABCDE guide is a useful way to notice potentially concerning changes. It is not a home diagnosis tool, and a mole does not need to meet every point before it should be checked.
- A – Asymmetry: one half of the mole does not match the other.
- B – Border: the edge becomes irregular, blurred, scalloped or poorly defined.
- C – Colour: there are several colours, or the mole becomes darker, blacker, redder, white or blue.
- D – Diameter: the lesion is increasing in size, particularly if it is larger than around 6 mm.
- E – Evolving: there is any new or ongoing change in size, shape, colour, surface or sensation.
The most valuable observation is often the one that does not fit a checklist: the so-called ugly duckling sign. If one mole looks noticeably different from your other moles, arrange an assessment. This may be because it is darker, raised when others are flat, unusually shaped, or changing in a way that stands out.
You should also seek medical advice for a new pigmented lesion in adulthood, a sore that does not heal, a lesion that repeatedly bleeds or crusts, or an area of skin that becomes persistently itchy or tender. These symptoms do not automatically mean skin cancer, but they should not be ignored.
When should you act quickly?
Contact a healthcare professional promptly if a mole is changing rapidly over weeks or months, bleeding without having been injured, developing a new uneven colour, or becoming noticeably larger. The same applies if you have a personal history of melanoma or other skin cancer, a strong family history, a weakened immune system, or many atypical-looking moles.
If a lesion is actively bleeding and will not stop with firm pressure, seek medical advice. For most changing moles, the appropriate route is a timely clinical skin assessment rather than waiting to see whether the change settles.
What a mole check can and cannot tell you
A trained clinician can often recognise features that are consistent with a benign mole, seborrhoeic keratosis, skin tag or another common skin lesion. Dermatoscopy improves the quality of assessment and supports decisions about monitoring or onward referral.
However, no visual examination can provide absolute certainty in every case. When a lesion has suspicious features, the definitive diagnosis may require removal or biopsy, followed by laboratory analysis. This is why a clear plan after assessment matters as much as the initial examination.
A good consultation should leave you knowing what the clinician has found, whether the lesion needs observation or further action, and what timescale applies. If monitoring is advised, ask what changes should prompt an earlier review and whether baseline clinical photographs would be helpful.
Preparing for your skin assessment
You do not need to do anything complicated before an appointment. If possible, avoid covering the mole with heavy make-up, fake tan or opaque cream on the day, as this can make examination more difficult. Make a note of when you first noticed the lesion and any changes you have seen.
Photographs taken over time can be useful, particularly where they show a clear change in size or colour. Try not to rely on a single close-up image alone, as lighting and camera settings can distort colour. A photograph showing the mole in relation to the surrounding skin can provide helpful context.
Be ready to mention previous significant sun exposure, episodes of blistering sunburn, use of sunbeds, medicines that suppress your immune system, and skin cancer in close relatives. These factors do not determine the diagnosis, but they help inform clinical judgement.
Are skin checks only for dark or unusual moles?
No. Melanoma and other skin cancers can appear in different ways. Some lesions are brown or black, but others may be pink, red, skin-coloured or relatively pale. They can occur on areas regularly exposed to the sun, such as the face, ears, scalp, neck and arms, but they can also develop on the soles of the feet, under nails, between toes and in other less visible areas.
That is one reason a whole-skin awareness habit is useful. Check areas you can easily see, and ask a partner, family member or professional to look at difficult areas such as the back, scalp and behind the ears. There is no need to examine your skin obsessively. The aim is to become familiar with what is normal for you, so meaningful change is easier to spot.
Monitoring a mole safely between appointments
If a clinician has advised observation, follow the specific timeframe you have been given. In the meantime, avoid picking, scratching or trying to remove a mole yourself. At-home treatments and unregulated removal products can damage the skin, cause scarring and make later assessment more difficult.
Protecting your skin from ultraviolet exposure is sensible for everyone. Use broad-spectrum sunscreen when appropriate, seek shade during strong sunlight, wear protective clothing and avoid sunbeds. Sun protection reduces future skin damage, but it should never be used as a reason to delay assessment of a mole that is already changing.
Rapid access for a changing mole
Waiting with a worrying skin change can be stressful, particularly when you do not know whether it is harmless or needs treatment. A prompt, expert assessment gives you a clearer answer and, where needed, a defined onward plan.
Clinic 360 offers accessible private dermatology assessment in Leeds, with no GP referral necessary. If a mole has changed or does not look right to you, arranging a professional review with our consultant dermatologist is a practical step towards reassurance or timely treatment.