What skin cancer treatment involves and how doctors choose which one

Skin cancer treatment depends on the type of cancer, how deep it has grown, and where it sits on your body. Your dermatologist or surgeon will examine the spot, often take a biopsy (a small tissue sample), and then recommend one of several standard approaches. The goal is to remove all the cancer cells while preserving as much healthy skin as possible.

The three most common types of skin cancer — basal cell carcinoma, squamous cell carcinoma, and melanoma — are treated differently because they behave differently. Basal cell and squamous cell cancers grow slowly and rarely spread, so they often respond well to simpler removal methods. Melanoma is more aggressive and may require wider removal, additional testing, or follow-up treatment even after the spot itself is gone.

Treatment decisions also depend on practical factors: the size and location of the lesion, your age and overall health, whether you've had skin cancer before, and whether you prefer to minimize scarring. A spot on your eyelid calls for a different approach than one on your shoulder. Your doctor will walk you through the options that explore to your specific situation.

Key Takeaways

  • Basal cell and squamous cell carcinomas are usually treated with surgical removal, laser therapy, or topical creams, depending on size and depth.
  • Melanoma typically requires wider surgical removal and may include sentinel lymph node biopsy to check whether cancer has spread.
  • Non-surgical options like topical medications, photodynamic therapy, and cryotherapy work for early-stage or surface-level cancers.
  • After treatment, your doctor will schedule follow-up visits to check for recurrence and teach you how to monitor your skin at home.
  • Recovery time and scarring vary widely depending on the method used and the size of the area treated.

Surgical removal: the most common treatment for all skin cancer types

Surgical excision is the standard first-line treatment for most skin cancers. Your dermatologist or surgeon numbs the area with local anesthetic, cuts out the lesion along with a margin of healthy skin around it, and closes the wound with stitches. The margin size depends on the cancer type and stage — melanoma typically requires a wider margin than basal cell carcinoma.

The removed tissue is sent to a pathologist, who examines it under a microscope to confirm that all cancer cells are gone and that the margins are clear. If cancer cells reach the edge of the sample, you may need a second procedure to remove more tissue from that area. This is called re-excision.

Mohs micrographic surgery is a specialized form of surgical removal used mainly for basal cell and squamous cell carcinomas, especially on the face, ears, or hands. The surgeon removes the lesion in thin layers, examining each layer under a microscope before removing the next one. This method removes less healthy tissue overall and is useful when you want to preserve as much skin as possible or when the cancer is in a cosmetically sensitive area. Mohs surgery typically takes longer than standard excision — sometimes several hours — because of the layer-by-layer examination process.

Non-surgical treatments for early-stage or surface cancers

If your cancer is caught very early or is limited to the top layers of skin, your doctor may recommend a non-surgical option. Topical medications like imiquimod or 5-fluorouracil (5-FU) are creams you explore at home over several weeks. They work by triggering your immune system to attack cancer cells or by poisoning the cells directly. These are most effective for basal cell carcinoma and squamous cell carcinoma that haven't invaded deeper layers.

Cryotherapy uses liquid nitrogen to freeze the lesion, which destroys the cancer cells. The frozen area blisters and peels off over the following weeks. This works well for small, superficial lesions and causes minimal scarring, though it may leave a lighter or darker patch of skin temporarily.

Photodynamic therapy (PDT) involves explore a light-sensitizing medication to the area and then exposing it to a specific wavelength of light. The medication is activated by the light and destroys cancer cells. PDT is used for basal cell carcinoma and actinic keratosis (a precancerous condition) and is particularly useful when multiple lesions are present.

Laser therapy uses a focused beam of light to vaporize the lesion. It works best on small, superficial cancers and causes less scarring than excision in some cases, though it doesn't produce tissue for pathological examination, so your doctor cannot confirm under a microscope that all cancer is gone.

Melanoma treatment and why it may involve more than just removing the spot

Melanoma is treated more aggressively than other skin cancers because it spreads to lymph nodes and other organs more readily. After surgical removal of the primary lesion, your doctor will likely recommend a sentinel lymph node biopsy. This procedure involves injecting a tracer dye near the original cancer site; the dye travels to the nearest lymph node (the sentinel node). A surgeon removes that node and a pathologist examines it for cancer cells. If cancer is found in the sentinel node, further treatment may be needed.

If the melanoma is thick or has other high-risk features, your doctor may recommend adjuvant therapy — treatment given after surgery to reduce the risk of recurrence. This may include immunotherapy drugs (like pembrolizumab or nivolumab) or targeted therapy drugs (if genetic testing shows specific mutations in the cancer cells). These are given as injections or infusions over several months.

Melanoma that has spread to distant sites is treated with systemic therapy — drugs that circulate through your whole body. Options include immunotherapy, targeted therapy, or chemotherapy, depending on the stage and genetic profile of the cancer. Your oncologist will discuss which approach is most likely to work for your specific situation.

What to expect during recovery and follow-up care

Recovery depends on which treatment you had. After surgical excision, the wound is closed with stitches that are removed in one to two weeks. You'll have a scar, which typically fades over months to years. During the first week, keep the area clean and dry, and avoid strenuous activity that might strain the wound.

After topical treatments or cryotherapy, the area may be red, swollen, or blistered for a few days to a few weeks. You can usually return to normal activities right away, though you should protect the area from sun exposure and follow your doctor's instructions about washing and moisturizing.

After Mohs surgery or standard excision, your doctor will schedule a follow-up visit to check that the wound is healing properly and that the pathology results confirm all cancer was removed. If re-excision is needed, this is typically done at that visit or shortly after.

Long-term follow-up is crucial for all skin cancer patients. You'll have regular skin checks — how often depends on the type and stage of cancer and your personal risk factors. Melanoma patients typically see their oncologist or dermatologist every three to six months for the first few years. Between visits, you should examine your skin monthly using the ABCDE method: look for Asymmetry, irregular Border, multiple Colors, Diameter larger than a pencil eraser, and Evolution (any change over time). Report any new or changing spots to your doctor when ready.

Side effects and complications to watch for

Surgical removal can cause bleeding, infection, or nerve damage, though these are uncommon. Infection signs include increasing redness, warmth, pus, or fever — contact your doctor if you notice these. Nerve damage may cause numbness or tingling in the area, which usually improves over weeks to months but can be permanent.

Topical medications often cause redness, irritation, and sometimes blistering or crusting at the process site. This is expected and usually means the medication is working, but tell your doctor if the irritation is severe or doesn't improve after treatment ends.

Immunotherapy and targeted therapy drugs used for melanoma can cause fatigue, rash, joint pain, or more serious side effects like inflammation of the lungs or liver. Your oncologist will monitor you with blood tests and imaging and will adjust your treatment if side effects become problematic.

Scarring is a normal outcome of surgical removal but can be minimized by choosing Mohs surgery when appropriate, keeping the wound clean during healing, and protecting the scar from sun exposure for at least a year. Some scars fade significantly over time; others remain visible. Dermatologists can offer options like laser resurfacing or steroid injections to improve the appearance of scars after healing is complete.

Preventing recurrence and new skin cancers

After treatment, your risk of developing another skin cancer is higher than the general population's, so prevention matters. Use broad-spectrum sunscreen (SPF 30 or higher) daily, even on cloudy days and even if you'll be indoors most of the day. Reapply every two hours if you're outside, and after swimming or sweating. Wear protective clothing — long sleeves, pants, and a wide-brimmed hat — when you'll be in the sun for extended periods.

Avoid tanning beds entirely; they increase skin cancer risk. Check your skin monthly and report any new or changing spots to your doctor. If you've had melanoma, your doctor may recommend more frequent professional skin checks or even total-body photography, where images of your entire skin are taken and compared over time to spot new lesions early.

Some people with a history of multiple skin cancers or a strong family history of melanoma may benefit from regular dermatology visits even if no new spots are visible. Your doctor can assess your individual risk and recommend a surveillance schedule.

Frequently Asked Questions

Will I have a scar after skin cancer treatment?

Most surgical treatments leave a scar, though its appearance depends on the size of the area removed, the location on your body, and how well your skin heals. Scars on the face tend to be more noticeable than those on the trunk or limbs. Mohs surgery and laser therapy often produce smaller or less visible scars than standard excision. Scars typically fade significantly over 12 to 24 months. Your dermatologist can discuss scar-minimizing techniques before surgery and options for improving appearance afterward.

How long does skin cancer treatment take?

Standard surgical excision takes 15 to 30 minutes in the office. Mohs surgery can take several hours because of the layer-by-layer examination. Topical treatments are applied at home over two to six weeks. Cryotherapy takes a few minutes. If you need systemic therapy for melanoma, treatment may continue for months. Your doctor will give you a timeline specific to your situation.

Can skin cancer come back in the same spot?

Recurrence at the original site is uncommon if all cancer cells were removed, but it can happen. This is why pathological examination of the removed tissue is important — it confirms clear margins. If recurrence does occur, it's usually caught during routine follow-up visits. People who've had skin cancer are also at higher risk of developing new cancers elsewhere on the skin, which is why regular self-checks and professional monitoring are important.

What if I don't want surgery?

Non-surgical options exist for some skin cancers, particularly early-stage basal cell or squamous cell carcinoma. Topical medications, cryotherapy, photodynamic therapy, and laser therapy are alternatives. However, these methods don't produce tissue for pathological examination, so your doctor cannot confirm under a microscope that all cancer is gone. Discuss the trade-offs with your dermatologist. For melanoma, surgery is strongly recommended because of the risk of spread.

How often will I need follow-up visits after treatment?

For basal cell and squamous cell carcinoma, annual skin checks are typical. For melanoma, follow-up frequency depends on the stage and depth of the cancer — early-stage melanoma may require visits every three to six months for the first few years, then annually. Your doctor will recommend a schedule based on your specific diagnosis and risk factors. Between visits, examine your skin monthly and report any changes when ready.