01 · Overview
The short version
Change is the biggest clue
A mole or spot that changes in size, shape, color, feel, or healing pattern deserves attention. Melanoma often shows change, but other skin cancers can look like a sore, bump, or scaly patch that keeps coming back.
UV exposure raises risk
Sunlight and tanning beds both expose skin to UV rays. That damage raises the risk of skin cancer, and a tan is a sign of skin injury rather than protection.
Different types can look different
Basal cell cancer and squamous cell cancer are more common, while melanoma is less common but more dangerous. Skin cancer can show up on the face, ears, neck, hands, and arms, but it can also appear elsewhere.
Early care makes a difference
A suspicious lesion is worth checking sooner rather than later. Clinicians may examine it closely and sometimes recommend a biopsy to find out what it is and how it should be treated.
02 · Care guidance
When to get help
Emergency help
- Call 911 now if a skin problem comes with severe trouble breathing, face or throat swelling, chest pain, fainting, confusion, or sudden weakness. Those symptoms point to an emergency that is bigger than a skin concern.
Get advice promptly
- Arrange prompt medical evaluation if a mole is changing, a sore will not heal, a spot bleeds easily, or a growth is new, dark, irregular, or looks very different from your other spots.
- Get checked sooner if you are immunocompromised, have had prior skin cancer, have a strong family history, or notice a rapidly changing lesion.
For non-urgent concerns, book a primary care or dermatology visit and bring clear photos, when the spot first appeared, and whether it has changed over time.
03 · Skin Cancer
What skin cancer can look like at first
Skin cancer starts when skin cells grow in an abnormal way, and it does not always look dramatic.
Skin cancer is the most common form of cancer in the United States. The two most common types are basal cell cancer and squamous cell cancer. They usually form on the head, face, neck, hands, and arms. Melanoma is less common, but it is more dangerous.
The first sign is not always a large or painful growth. Some spots look like a pimple, a rough patch, a shiny bump, a scar, or a sore that keeps reopening. A spot that looks unusual for you matters more than whether it looks alarming to someone else.
- A new spot that keeps changing deserves attention.
- A lesion that bleeds, crusts, or does not heal should be checked.
- Skin cancer can happen even without a clear history of severe sunburn.
04 · Skin Cancer
The changes that should get your attention
A changing mole or a sore that keeps coming back is a common reason to seek care.
For melanoma, the ABCDE pattern can help you notice a lesion that needs a closer look: asymmetry, irregular border, uneven color, larger diameter, and evolving appearance. Another warning sign is a new mole or a spot that looks different from your other spots. Melanoma may be black, blue-black, brown, tan, or mixed in color.
Basal cell and squamous cell cancers often show up as a bump, a patch, or a sore that does not heal. They may itch, crust, bleed with minor injury, or seem to get better and then return. A spot that persists for weeks or months deserves medical review.
- Take a photo if a spot changes, so you can compare it over time.
- Notice whether it is growing, darkening, or becoming more irregular.
- Repeated scabbing or bleeding is not something to watch casually.
05 · Skin Cancer
Who is more likely to get skin cancer
Anyone can get skin cancer, but some people have a higher risk than others.
Risk is higher in people with a lot of sun exposure, a history of sunburns, lighter skin, hair, or eyes, and a family history of skin cancer. Risk also increases with age, although younger people can still develop skin cancer.
Tanning beds are not a safe shortcut to a tan. They still expose skin to UV light, and that exposure damages skin. People who are immunocompromised or who have had skin cancer before may need closer follow-up because new or changing spots matter more in those settings.
- Sun damage builds up over many years.
- Prior skin cancer and family history both matter.
- Indoor tanning still raises UV exposure instead of lowering it.
06 · Skin Cancer
What lowers risk and what does not
Protecting skin means reducing UV exposure, not trying to get a safer tan.
UV rays from the sun damage skin over time. Protecting your skin does not mean staying indoors all day. It means using shade, sunscreen, hats, sunglasses, and clothing to reduce strong exposure. The best results come from combining these steps instead of relying on just one.
A tan is not proof that your skin is healthy. Indoor tanning is not safer than outdoor tanning, and a base tan does not protect you from sunburn. Tanning pills can be dangerous and are not approved by the FDA for this purpose. Sunless tanners may be a cosmetic choice, but they do not protect you from UV rays.
- Use shade, clothing, and sunscreen together when possible.
- Do not rely on a base tan for protection.
- Check your skin regularly so changes are easier to spot.
07 · Skin Cancer
How a clinician checks a suspicious spot
A close exam is the first step, and a biopsy may be needed to know for sure.
At a visit, a clinician may look closely at the lesion, ask when it first appeared, and ask whether it has changed. They may compare it with other spots on your skin and ask about sun exposure, tanning, prior skin cancer, and family history.
If the spot looks concerning, a biopsy may be recommended. That means removing a small piece of the spot, or sometimes the whole spot, so it can be examined under a microscope. This matters because not every unusual spot is cancer, and some skin cancers do not look obvious at first.
- Bring a timeline of the spot and clear photos if you have them.
- Do not try to pick, cut, or burn off a suspicious lesion at home.
- Ask what the results mean and whether follow-up skin checks are needed.
08 · Skin Cancer
Treatment and follow-up after a diagnosis
Treatment depends on the type, size, and stage of the skin cancer.
Surgery is a common treatment for skin cancer, and it is the first treatment for all stages of melanoma according to MedlinePlus. Other options can include radiation therapy, chemotherapy, photodynamic therapy, biologic therapy, and targeted therapy, depending on the cancer type and how far it has spread.
After treatment, follow-up matters. People who have had one skin cancer may need regular skin exams because having one cancer can raise the chance of another. Your clinician can also explain scar care, sun protection, and what changes should trigger a return visit.
- Treatment choices differ for basal cell, squamous cell, and melanoma.
- Earlier treatment is often easier than waiting until the lesion grows.
- Follow-up skin checks are part of the plan, not an extra step to skip.
09 · FAQ
Questions people ask
Should I wait and see if a sore heals on its own?
If a sore has been present for weeks, keeps scabbing over, bleeds easily, or seems to heal and then return, it is better to have it examined rather than waiting longer. A simple skin injury should usually improve over time. A persistent sore deserves evaluation because some skin cancers can look like a wound that never quite closes.
Do all skin cancers need the same treatment?
No. Treatment depends on the type of skin cancer, how large it is, and whether it has spread. Surgery is common, and melanoma treatment can also include other approaches such as radiation, chemotherapy, biologic therapy, or targeted therapy. The plan is based on the diagnosis, so the first step is getting the spot checked and confirmed.
Can skin cancer come back after it is treated?
It can, and people who have had one skin cancer may also be more likely to develop another. That is why follow-up skin checks matter after treatment. The exact schedule depends on your history and the type of cancer, so the goal is not just to treat one spot but to keep watching the rest of your skin too.
Are tanning beds safer than the sun because they are controlled?
No. Indoor tanning still exposes you to UV rays, and that exposure damages skin. Tanning beds are not a safe way to get a tan, and a base tan does not protect you from sunburn. If the goal is appearance, sunless tanners are a cosmetic option, but they do not protect against UV damage.
What should I bring to a skin appointment?
Bring clear photos of the spot if you have them, note when it first appeared, and write down whether it has changed in size, color, shape, or bleeding. That helps the clinician compare what you noticed with what they see in the office. If you have a history of skin cancer, tanning, or strong family history, mention that too.
10 · References
References and supporting evidence
These sources support the points identified below. Source checking is not clinical approval.
- S1: Skin CancerMedlinePlus / U.S. National Library of Medicine
Explains that skin cancer is common, that basal cell and squamous cell cancers are the most common types, and that they often appear on sun-exposed areas.
- S2: MelanomaMedlinePlus / U.S. National Library of Medicine
Explains the main melanoma warning signs and that melanoma can appear as a changing mole or a new lesion.
- S3: TanningMedlinePlus / U.S. National Library of Medicine
Explains that tanning beds and outdoor tanning both increase UV exposure and skin cancer risk, and that tanning is not protective.
General information, not a diagnosis. This guide is not a substitute for care from a qualified healthcare professional. For an emergency, call 911 in the US or your local emergency number. Illustrations are conceptual and are not diagnostic images.