An itchy or bleeding mole is often caused by something harmless, such as catching it on clothing, shaving over it or dry, irritated skin. However, itching, bleeding or crusting without an obvious cause, or alongside changes in size, shape or colour, can be a warning sign of melanoma. If a mole bleeds or itches repeatedly, or is changing, see your GP promptly for assessment.
Common harmless causes
Moles, especially raised ones, are easily irritated. Everyday causes include:
- Friction: a mole on the bra line, waistband, collar or beneath a watch strap can be rubbed repeatedly.
- Shaving or grooming: nicking a raised mole with a razor often causes bleeding that stops quickly and heals within a week or two.
- Dry skin and eczema: itchy skin around a mole can make the mole itself feel itchy.
- Insect bites or scratching: local inflammation can make a mole temporarily red, raised or tender.
- Seborrhoeic keratoses: common, harmless ‘stuck-on’ growths that are often mistaken for moles and can itch or catch.
In these situations the mole usually returns to its normal appearance once the irritation settles.
When itching or bleeding is a concern
Itching or bleeding is more worrying if:
- There is no clear cause: the mole bleeds, oozes or crusts without being caught or scratched.
- It keeps happening: bleeding or itching recurs or persists for more than a couple of weeks.
- The mole is changing: it has grown, altered in shape or colour, or developed a new lump within it.
- It will not heal: a sore or scab on the mole keeps coming back.
These features do not mean you definitely have skin cancer, but they should be checked.
The ABCDE checklist
Doctors use the ABCDE rule to look for features of melanoma:
- A – Asymmetry: the two halves of the mole look different.
- B – Border: the edge is irregular, ragged, notched or blurred.
- C – Colour: several shades of brown, black, red, pink, white or blue within one mole.
- D – Diameter: larger than about 6mm across, though melanomas can be smaller.
- E – Evolving: any change in size, shape, colour or height, or new symptoms such as itching, bleeding or crusting.
The ‘E’ is particularly important: a mole that is changing deserves attention even if it scores normally on the other features. Doctors also look for an ‘ugly duckling’, a mole that looks different from your others.
What to do next
If a mole is changing, or bleeds or itches without explanation, see your GP promptly for assessment. Your GP may examine it with a dermatoscope, take photographs to monitor it, or refer you to a hospital skin cancer clinic if melanoma or another skin cancer is suspected. Do not wait for a routine check-up and do not try to remove the mole yourself; home removal products can cause scarring and infection and destroy the tissue needed for diagnosis.
Other skin cancers that bleed
Not every bleeding spot is a mole. Basal cell carcinoma often appears as a pearly or shiny lump, or a sore that bleeds and scabs but never fully heals, typically on sun-exposed skin. Squamous cell carcinoma can present as a firm, scaly or crusted lump that may bleed. Both should be assessed by a doctor.
Private assessment and removal
Some people also choose a private consultation for a mole that is catching or bothering them. Mr Nassab can assess moles and, where appropriate, remove them under local anaesthetic, with the tissue usually sent for histology so the diagnosis is confirmed under a microscope. If there is a significant suspicion of melanoma, the appropriate pathway may be referral into a specialist skin cancer service, and he will advise on this. Mole removal is from £650 with the final quote confirmed after assessment, and the consultation costs £150.
Protecting your skin
Reduce your risk by avoiding sunburn, seeking shade in the middle of the day, wearing protective clothing and using a broad-spectrum sunscreen with good UVA protection. Avoid sunbeds. Check your skin monthly in good light, using a mirror or asking someone to look at areas you cannot see, such as your back and scalp. Photographs taken every few months can make changes easier to spot.
Frequently Asked Questions
Is an itchy mole always cancer?
No. Most itchy moles are irritated by friction, dry skin or scratching. Persistent or unexplained itching, especially with other changes, should be checked by your GP.
What should you do after cutting a mole while shaving?
Apply gentle pressure until the bleeding stops and keep it clean. If it has not healed within two weeks, or looks different afterwards, see your GP.
Can a mole bleed for no reason?
Unexplained bleeding from a mole is a reason to see your GP promptly, as it can occasionally be a sign of melanoma.
Should an itchy mole be removed?
An irritated but harmless mole can be removed if it keeps catching. A suspicious mole should be assessed first so the right treatment and pathway are chosen.
