mole changes that comes and goes

Overview

A mole (also called a naevus) is a common spot on the skin made of pigment-producing cells. Many moles stay the same for years, but some can change over time—growing, shrinking, or becoming darker or lighter. When these changes come and go, it can be confusing. Most are harmless, but any change is worth checking with a doctor.

Yes, very common. Nearly every adult has some moles, and many change over time. Fluctuating moles are also common, especially during times of hormonal change.

It can affect anyone, but it is more noticeable in people with fair skin, many moles, or a family history of skin cancer. Hormonal changes during puberty, pregnancy, or menopause can also alter moles.

Symptoms

Common symptoms

• A mole that changes in size, shape, or colour, but later returns to its original look.
• Itching or tenderness in a mole that comes and goes.
• A mole that darkens in the sun and lightens in the winter.
• New small moles appearing during hormonal changes.

Symptoms in children

• Moles often appear and sometimes fade during childhood.
• A mole that comes and goes in a child is usually harmless.
• But any mole that grows rapidly or looks unlike others should be seen by a paediatrician.

Symptoms in older adults

• New moles in adults over 30 are less common and should be checked.
• Existing moles may become more raised or lose pigment over time.
• A mole that repeatedly bleeds or changes needs prompt evaluation.

Causes

Main causes

• Sun exposure, which stimulates pigment cells and may change existing moles.
• Hormonal fluctuations during puberty, pregnancy, or hormone therapy.
• Natural ageing of skin cells, causing moles to fade, become raised, or sometimes reappear.
• Genetics — you inherit a tendency to develop moles.

Risk factors

• Fair skin or a history of sunburns.
• Many moles (more than 50) or atypical moles (dysplastic naevi).
• Family history of melanoma or other skin cancers.
• Frequent use of tanning beds.

When to see a doctor

See a doctor urgently if:

• Any mole that is changing according to the ABCDE rule — especially asymmetry, irregular border, or multiple colours.
• A mole that is suddenly different from your other moles (the 'ugly duckling' sign).
• A mole that has been bleeding or crusting for more than a few days.

Book a routine appointment if:

• During your regular skin check, mention any moles that have changed and returned to normal.
• If you notice a mole that disappears completely, show the area to your doctor at your next visit.
• Annual skin exam for people with high risk.

Diagnosis

Your doctor will look at your skin, examine the mole with a magnifying tool called a dermatoscope, and ask about your history. They may take a photograph to track changes over time.

Tests that may be done

• Visual examination by a healthcare professional.
• Dermatoscopy (a special lens to see deeper skin features).
• Digital monitoring (sequential imaging) for changing moles.
• Biopsy (removing the mole or a part of it for lab testing) if there is any concern.

What to expect at your appointment

The appointment is quick and painless. You may be asked to undress to underwear so a doctor can see all your skin. If a mole looks suspicious, a local anaesthetic is used before a small sample is taken. Results take about a week.

Treatment

Most fluctuating moles need no treatment. If a mole is concerning, your doctor may want to remove it entirely. Treatment depends on the biopsy result: harmless moles can be left alone, while suspicious ones are removed completely.

Self-care at home

• Use sunscreen with high SPF and avoid sunburn.
• Do regular skin self-exams every month using a mirror.
• Take photos of your moles to track changes.
• Wear protective clothing and a hat in strong sun.

Medical treatments

There are no specific medicines for moles. If a mole is diagnosed as skin cancer, treatment may involve a minor operation to remove a wider margin of skin around it. More advanced cases might need additional treatments such as radiotherapy or immunotherapy, but these are only managed by specialists.

When is surgery considered?

Surgery is often the first and only treatment for melanoma found early. It involves removing the mole plus a small border of healthy skin under local anaesthetic. If you need surgery, your team will explain the procedure and recovery.

Living with this condition

Most moles are harmless, so you can live your life normally. If you have many moles, you might find it helpful to keep a photo diary of your skin. A once-a-month check of your skin can help you notice changes early.

Lifestyle tips

• Protect your skin from the sun every day, even in winter.
• Avoid tanning beds and prolonged sunbathing.
• If you notice a mole changing, see your doctor rather than waiting.

Diet and exercise

There is no special diet for moles, but eating a healthy, balanced diet and exercising regularly keeps your immune system strong. Sun protection is more important than any specific food.

Mental health and emotional wellbeing

Worrying about a changing mole can cause anxiety. Remember that most changes are benign. Sharing your concerns with a doctor can ease your mind. If you feel overwhelmed, talk to a counsellor or support group.

Prevention

You cannot prevent moles from forming, but you can reduce your risk of melanoma by protecting your skin from too much sun. This is important from childhood.

Screening programmes

People with risk factors may benefit from regular skin checks with a doctor. Self-exams at home are a simple way to spot changes that come and go.

Complications

If left untreated

• A melanoma that is not removed early can spread to other parts of the body, such as lymph nodes or organs.
• Repeated bleeding or infection in a mole can cause discomfort.

Long-term outlook

The outlook is very positive if a changing mole is checked on time. Most moles that come and go are harmless, and even melanomas found at an early stage are highly curable. Ongoing self-awareness and professional review are your best protection.

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