mole changes flare ups

Overview

A mole is a small, colored spot on the skin made of pigment-producing cells. Most moles are harmless, but sometimes they change in size, color, shape, or texture. These changes are often normal, but they can sometimes be an early warning sign of skin cancer. This article explains what mole changes can mean and when to see a doctor.

Yes. Most people have between 10 and 40 moles. Mole changes, especially new ones, are very common. Most are nothing to worry about, but a small number of changes may be serious.

Anyone can have mole changes, but people with fair skin, light hair or eyes, many moles, a family history of skin cancer, or a history of sunburns are at higher risk. Hormonal changes such as pregnancy can also affect moles.

Symptoms

Common symptoms

• Growth in size, especially if it becomes larger than about 6 millimeters (the size of a pencil eraser)
• A change in shape, especially an irregular border or asymmetry
• A change in color, such as multiple colors or an uneven shade
• A new bump or elevation that wasn't there before
• Itching, crusting, or bleeding from a mole

Symptoms in children

• In children, the same warning signs apply: a mole that grows, changes color, or bleeds.
• New moles that appear after age 10 are normal, but any that look unusual should be checked.

Symptoms in older adults

• In older adults, new moles are less common, so any new mole or change should be looked at.
• Changing moles can be harder to see on aged or sun-damaged skin, so use good lighting and a mirror for self-checks.

Causes

Main causes

• Changes in moles are often due to sun exposure, which can alter skin cells over time.
• Hormonal shifts, such as during pregnancy or teenage years, can make moles darker or larger.
• Aging itself can cause moles to change slowly.
• Some changes are harmless, but they can also be an early sign of skin cancer, such as melanoma.

Risk factors

• Fair skin, light hair, or light eyes
• Many moles (more than 50) or moles that look unusual
• A family history of skin cancer, especially melanoma
• A history of sunburns, particularly blistering sunburns
• Using indoor tanning beds

When to see a doctor

See a doctor urgently if:

• A mole that has changed in size, shape, or color over a few weeks
• A mole that bleeds, itches, or crusts without healing
• A new mole that appears after age 30
• A mole that looks very different from your other moles

Book a routine appointment if:

• Any mole you are unsure about, you can ask at your next routine check-up
• If you have a high risk of skin cancer, see a doctor for a full skin exam once a year

Diagnosis

A doctor or dermatologist will examine the mole carefully with the naked eye and often with a special magnifying tool called a dermatoscope. They will ask about your history and any changes you have noticed.

Tests that may be done

• A visual exam and dermatoscopy (a magnifying lens)
• A biopsy, where the mole is removed and sent to a laboratory to look for cancer cells

What to expect at your appointment

The examination is quick and painless. If the doctor thinks the mole is suspicious, they will remove part or all of it with a small cut. The area will be numbed, and you may feel some pressure but usually no pain. The biopsy results usually take about a week. If it is positive for cancer, your doctor will discuss next steps with you.

Treatment

Treatment depends entirely on what the biopsy shows. If the mole is benign (not cancer), no treatment is needed. If it is cancer or pre-cancer, the doctor will recommend the best approach based on the type and stage.

Self-care at home

• Monitor your moles monthly at home with photographs.
• Protect skin from the sun: wear sunscreen, hats, and protective clothing.
• Do not pick at, scratch, or irritate a mole.
• Keep a diary of any changes and share them with your doctor.

Medical treatments

For melanoma or other skin cancers, the standard initial treatment is surgery to remove the mole and a small margin of healthy skin around it. More advanced cases may require additional procedures, such as imaging tests, lymph node checks, or therapies like immunotherapy, radiation, or targeted medication. Your oncology team will explain the options, benefits, and risks.

When is surgery considered?

Surgery is usually recommended if the mole is melanoma or has features that make it high-risk. The doctor removes the entire mole and a safe border of normal skin to make sure all cancer cells are gone.

Living with this condition

After a mole has been checked, you can live normally. Keep an eye on your skin, protect it from the sun, and follow your doctor's advice. If you had a mole removed, keep the area clean and covered until healed.

Lifestyle tips

• Do a monthly self-skin check from head to toe using a full-length mirror and a hand mirror.
• Wear sunscreen with SPF 30 or higher every day, even on cloudy days.
• Avoid tanning beds and sunbathing between 10am and 4pm.
• Stay well-hydrated and maintain a healthy weight.

Diet and exercise

A balanced diet rich in fruits, vegetables, and whole grains helps keep your immune system strong, and regular physical activity supports overall health. There is no specific diet to cure or prevent skin cancer, but a healthy lifestyle supports recovery.

Mental health and emotional wellbeing

Waiting for biopsy results or living with a changing mole can cause anxiety. It's normal to worry. Talk to your doctor about your concerns and bring a friend or family member to appointments for support.

Prevention

While you can't prevent all moles, you can reduce the risk of skin cancer by protecting your skin from the sun and watching for changes. Most skin cancers, including melanoma, can be caught early if you check regularly.

Screening programmes

There is no formal national screening program for skin cancer, but if you are at higher risk, your doctor may recommend regular full-body skin exams by a dermatologist. Self-exams every month are a good idea for everyone.

Complications

If left untreated

• If a cancerous mole is not removed, it can grow deeper into the skin and spread to other parts of the body, making treatment harder.
• Advanced melanoma can be life-threatening if left untreated.

Long-term outlook

The outlook is very good if melanoma is found early. Most early-stage melanomas are cured with surgery alone. Even if it is more advanced, treatments have improved greatly in recent years. The key is to get any suspicious mole checked quickly.

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