Melanoma: Changing Moles, Skin Checks, and Treatment

Melanoma is a serious form of skin cancer that often begins as a new spot or a changing mole, but early diagnosis can greatly improve treatment options. Regular skin checks, sun protection, and prompt medical evaluation of suspicious lesions are important parts of prevention and care.

Overview

Melanoma is a type of cancer that develops from melanocytes, the pigment-producing cells that give skin its color. It most often occurs on the skin, but it can also develop in less common sites such as the eye, mucous membranes, or under the nails. Although melanoma is less common than some other skin cancers, it is important because it can grow deeper into the skin and spread to other parts of the body if not found and treated early.

Many melanomas are first noticed as a new spot on the skin or a change in an existing mole. Some appear in areas that have had significant sun exposure, such as the back, legs, arms, face, and neck. Others can appear on areas not usually exposed to the sun, including the soles of the feet, palms, scalp, or under toenails and fingernails. This is why a complete skin check is more useful than looking only at sun-exposed areas.

Early-stage melanoma is often treated successfully with surgery alone. More advanced melanoma may require additional therapies that work throughout the body, such as immunotherapy or targeted therapy. Modern melanoma care is guided by careful diagnosis, staging, molecular testing when appropriate, and a treatment plan tailored to the individual patient.

Symptoms and Warning Signs of Changing Moles

Melanoma does not always cause pain or discomfort at first. The most common warning sign is a visible change: a mole may become larger, develop uneven colors, form irregular borders, or look different from a person’s other moles. Some melanomas appear as a dark brown or black spot, while others may be pink, red, skin-colored, blue, or white. A lesion that bleeds, crusts, itches, becomes tender, or does not heal should also be assessed.

The ABCDE rule is a helpful way to remember common melanoma warning signs. It is not a diagnosis, but it can guide people in deciding when to seek a professional skin examination:

• A – Asymmetry: one half of the spot does not match the other half.
• B – Border: the edges are irregular, blurred, notched, or uneven.
• C – Color: the spot contains several colors or has unusual shades.
• D – Diameter: the spot is enlarging or is larger than about 6 millimeters, although melanomas can be smaller.
• E – Evolving: the mole changes in size, shape, color, height, or symptoms.

Another useful concept is the “ugly duckling” sign. This means a mole or spot looks noticeably different from the person’s other moles. People with many moles may find this especially helpful, because the unusual lesion may stand out even if it does not meet every ABCDE feature.

Causes and Risk Factors

Melanoma develops when DNA damage in melanocytes leads to uncontrolled cell growth. Ultraviolet radiation from sunlight or tanning beds is a major preventable contributor, especially when exposure is intense enough to cause sunburn. However, melanoma can also occur in people with limited sun exposure or darker skin tones, so everyone should be aware of warning signs.

Risk is influenced by a combination of environmental, genetic, and personal factors. Having fair skin, light eyes, red or blond hair, many moles, atypical moles, a history of blistering sunburns, or use of indoor tanning can increase risk. A personal history of melanoma or other skin cancers, a family history of melanoma, and a weakened immune system are also important factors.

People with darker skin have a lower overall risk of melanoma, but diagnosis may occur later because suspicious lesions can be harder to recognize or may appear in unexpected areas, such as the soles, palms, or under the nails. Any persistent dark streak in a nail, new growth on the foot, or non-healing sore should be evaluated regardless of skin color. Awareness and timely assessment are important for all skin types.

Diagnosis and Staging

Diagnosis usually begins with a clinical skin examination. A dermatologist or trained clinician may use dermoscopy, a handheld magnifying device with light, to examine pigment patterns and structures not easily visible to the naked eye. The doctor will also ask about changes over time, personal and family history, sun exposure, previous skin cancers, and any symptoms such as bleeding or itching.

If melanoma is suspected, the next step is usually a biopsy, where the lesion is removed or sampled and examined by a pathologist. Whenever possible, an excisional biopsy that removes the entire suspicious spot with a narrow margin is preferred for accurate measurement of melanoma thickness. The pathology report may include features such as Breslow thickness, ulceration, mitotic rate, and margin status, all of which help guide treatment decisions.

Staging describes how deep the melanoma is and whether it has spread to lymph nodes or other organs. For some melanomas, a sentinel lymph node biopsy may be recommended to check the first lymph node or nodes that drain the area. Imaging tests such as ultrasound, CT, PET-CT, or MRI may be used for higher-risk or more advanced disease. Molecular testing, including testing for changes such as BRAF mutations, may help guide treatment when melanoma has spread or carries a higher risk of recurrence.

Treatment Options

Treatment depends on the stage of melanoma, the location of the tumor, pathology findings, overall health, and patient preferences. For melanoma confined to the skin, surgery is the main treatment. The surgeon removes the melanoma with an appropriate margin of normal-looking skin to reduce the chance of local recurrence. Very early melanomas may need only surgical excision and regular follow-up.

When melanoma is thicker or has features that suggest a higher risk of spread, additional procedures or treatments may be considered. Sentinel lymph node biopsy may provide staging information and help guide decisions. If lymph nodes are involved or if the melanoma has spread to other organs, systemic treatments may be recommended. Immunotherapy helps the immune system recognize and attack cancer cells, while targeted therapy may be used when the melanoma has specific gene changes, such as a BRAF mutation.

Radiation therapy is not the usual first treatment for early skin melanoma, but it may be used in selected situations, such as certain lymph node areas, symptom control, or when surgery is not suitable. Some patients may receive adjuvant therapy after surgery to reduce the risk of recurrence, while others may receive neoadjuvant therapy before surgery in selected advanced cases. Because melanoma treatment has become increasingly specialized, care is often coordinated by a multidisciplinary team that may include dermatology, surgical oncology, medical oncology, radiation oncology, pathology, radiology, and supportive care specialists.

Prevention and Self-care

Not all melanomas can be prevented, but reducing ultraviolet exposure can lower risk and protect overall skin health. Sun protection is most effective when used consistently, not only during holidays or at the beach. People should seek shade, wear protective clothing, use a broad-spectrum sunscreen on exposed skin, and avoid tanning beds. Sunscreen should be reapplied as directed, especially after swimming, sweating, or towel drying.

Regular skin self-exams help people notice changes earlier. A monthly check is a practical routine for many adults, especially those with risk factors. Good lighting and a full-length mirror are useful, and a hand mirror or help from a partner can assist with the scalp, back, buttocks, and backs of the legs. It is also important to check the soles of the feet, between toes, under nails, and behind the ears.

Taking photographs of moles or using a body map can make it easier to recognize changes over time. People with many moles, atypical moles, a previous melanoma, or a strong family history may need professional skin checks at intervals recommended by a dermatologist. Self-care should not replace medical evaluation; a changing or unusual lesion is best assessed by a qualified clinician.

Follow-up and Life After Melanoma

Follow-up care after melanoma is designed to detect recurrence, identify new skin cancers, and support recovery. The schedule depends on the original stage, treatment received, and individual risk factors. Follow-up visits may include a skin examination, assessment of lymph node areas, review of symptoms, and imaging or blood tests when clinically appropriate. Patients are usually encouraged to report new lumps, persistent unexplained symptoms, or changes in scars or skin lesions between appointments.

After treatment, many people feel more aware of their skin and sun exposure. This awareness is helpful, but it can also bring worry when a new spot appears. A clear follow-up plan, education about warning signs, and access to medical advice can reduce uncertainty. Patients may also benefit from support for scar care, fatigue, emotional health, physical activity, and returning to daily routines.

For international patients seeking coordinated evaluation or treatment, Acibadem International provides access to multidisciplinary specialists and JCI-accredited hospitals experienced in diagnosing and treating melanoma. As with all cancer care, the most appropriate plan should be based on a detailed medical assessment and discussion with qualified doctors.

When to See a Doctor

A doctor should evaluate any mole or skin spot that is new, changing, unusual, or not healing. This includes changes in size, shape, color, border, height, or sensation. Bleeding, crusting, persistent itching, tenderness, or a sore that repeatedly opens should also prompt a medical visit. It is better to have a benign lesion checked than to delay assessment of a melanoma.

People should seek a dermatology appointment more promptly if they have a personal history of melanoma, a strong family history, many atypical moles, or a weakened immune system. A new dark streak under a nail, a changing spot on the sole of the foot or palm, or a lesion that looks unlike other moles should not be ignored. In children and adolescents, melanoma is uncommon, but changing or symptomatic lesions still deserve professional evaluation.

Urgent emergency care is rarely needed for a mole itself, but rapid medical review is appropriate if there is a fast-growing skin tumor, signs of infection, or significant bleeding that does not stop with gentle pressure. For most suspicious moles, a scheduled visit with a dermatologist or qualified clinician is the right first step.

Frequently asked questions

Can melanoma develop from a normal-looking mole?

Yes. Melanoma can develop in an existing mole, but it can also appear as a new spot on previously normal skin. Any lesion that changes, looks different from nearby moles, or does not heal should be checked by a doctor.

Are all dark moles melanoma?

No. Many dark moles are benign and remain stable for years. However, color change, multiple colors, irregular borders, asymmetry, or rapid growth are reasons to seek a professional skin examination.

How is melanoma confirmed?

Melanoma is confirmed by biopsy and examination of the tissue under a microscope by a pathologist. A clinical exam can identify suspicious features, but the biopsy provides the diagnosis and important details for staging and treatment planning.

Is melanoma always caused by the sun?

Ultraviolet radiation from the sun and tanning beds is an important risk factor, but it is not the only cause. Genetics, immune system factors, mole patterns, and random DNA changes can also play a role, and melanoma can appear on areas with little sun exposure.

What is the usual treatment for early melanoma?

Early melanoma is usually treated with surgical removal of the tumor and a margin of surrounding normal skin. Depending on the thickness and pathology features, some patients may need additional staging procedures or follow-up rather than further treatment.

Can melanoma come back after treatment?

Melanoma can recur, especially if it was thicker or had spread before treatment. Regular follow-up visits, skin self-exams, and reporting new symptoms help doctors detect recurrence or new skin cancers as early as possible.

How often should someone have a skin check?

The best interval depends on personal risk factors such as previous melanoma, family history, number of moles, atypical moles, and immune status. Many people perform monthly self-exams, while professional skin check frequency should be personalized by a dermatologist or qualified clinician.

References

• World Health Organization
• American Academy of Dermatology
• National Cancer Institute
• European Society for Medical Oncology
• American Cancer Society

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.