Most adults should have a professional skin check at least once a year as part of a routine health exam, though your personal risk factors may mean you need one sooner or more often. The American Cancer Society recommends periodic skin exams for everyone over 20, and several international guidelines suggest every one to two years for average-risk adults. If you have risk factors like a family history of melanoma, fair skin, or a high number of moles, the timeline tightens considerably.
Screening Frequency Based on Your Risk
How often you need a professional skin exam depends almost entirely on your risk profile. For people with no family history of skin cancer, few moles, and darker skin that doesn’t burn easily, a check every one to two years during a routine physical is a reasonable starting point. Germany’s national screening program, one of the few population-wide programs in the world, offers exams every two years for all adults 35 and older.
If you fall into a higher-risk category, the schedule should be more aggressive. Guidelines from several cancer organizations recommend a full-body exam by a dermatologist every six months for high-risk individuals. You’re considered high-risk if you have fair skin, light or red hair, light eye color, a weakened immune system, or a personal or family history of any skin cancer. People with five or more atypical (unusual-looking) moles or more than 100 ordinary moles also qualify for annual exams at minimum, with some guidelines recommending every six months.
About 10% of all people diagnosed with melanoma have a family history of the disease. If that includes you, regular dermatologist visits and monthly self-exams are specifically recommended by the American Cancer Society.
Why Your Mole Count Matters
The number of moles on your body is one of the strongest predictors of melanoma risk, and it’s worth paying attention to. A meta-analysis of 46 studies found that people with more than 100 common moles have nearly seven times the risk of developing melanoma compared to those with 15 or fewer. The risk increases in a roughly linear pattern: more moles means more risk, without a clear ceiling.
Atypical moles, the ones that look a bit different from your others in color, shape, or border, carry their own weight. Having five atypical moles raises your melanoma risk sixfold compared to having none. The risk climbs steeply up to that threshold of five, then plateaus. If you’ve never counted your moles or had someone evaluate which ones look atypical, that alone is a good reason to schedule a baseline skin check.
Sunburn History Changes the Timeline
A history of blistering sunburns, especially in childhood and adolescence, is a meaningful risk factor. In a large prospective study, men who reported ever having a severe sunburn had roughly 2.4 times the risk of developing melanoma compared to men who hadn’t. The association was also present for squamous cell and basal cell carcinomas, though weaker. Among both men and women, the percentage who recalled painful or blistering burns as a child rose steeply with total lifetime sunburn count, reaching nearly 50% in men with 16 or more severe burns.
If you had multiple blistering sunburns growing up, or you spent years doing outdoor work, tanning, or using tanning beds, consider getting a baseline exam sooner rather than later, even if you don’t have other risk factors.
Signs You Should Go Now
Certain changes in your skin shouldn’t wait for a scheduled appointment. The ABCDE criteria are the standard framework for spotting suspicious moles: Asymmetry (one half doesn’t match the other), Border irregularity, Color variation within a single mole, Diameter larger than about 6 millimeters (roughly the size of a pencil eraser), and Evolution, meaning any noticeable change over weeks or months. A mole that is growing, changing color, or developing an irregular border warrants a prompt visit.
There’s also a useful concept called the “ugly duckling” sign. Rather than analyzing each mole in isolation, you compare a mole to the others on your body. If one looks obviously different from the rest, it deserves attention. In a study published in JAMA Dermatology, every melanoma in a group of 80 patients was identified as an ugly duckling by dermatologists. Using this comparison approach alongside standard criteria reduced the number of moles flagged for possible biopsy by nearly sevenfold, meaning it helps separate truly suspicious spots from harmless outliers.
Skin Cancer in Darker Skin Tones
People with darker skin tones develop melanoma less frequently overall, but when they do, it tends to appear in places that are easy to miss. Acral melanoma, the subtype most common in people of color, occurs on the palms, soles of the feet, and under the nails. These are areas with less pigment, and they aren’t related to sun exposure.
On the palms and soles, these lesions often appear as dark brown or black patches that may look symmetrical and uniform at first. Under a nail, they typically show up as a dark pigmented streak running the length of the nail, sometimes extending onto the surrounding skin or causing the nail to split. Some acral melanomas are amelanotic, meaning they appear pink or red rather than brown, which makes them even easier to overlook.
The standard ABCDE criteria don’t work well for this type of melanoma. An alternative framework called CUBED has been proposed: Colored lesions, Uncertain diagnosis, Bleeding, Enlarged, and Delayed healing. If you notice any persistent sore, dark streak, or non-healing wound on your hands, feet, or nails, get it checked regardless of your overall skin cancer risk.
What Children Need
It’s completely normal for children to develop new moles throughout childhood, so the appearance of a new mole alone isn’t cause for alarm. Pediatric melanoma is rare, but it looks different from the adult version. In children, melanoma often presents as a pink or red bump that’s uniform in color and can be any size. The traditional brown, tan, or black colors adults associate with skin cancer may not apply.
Pediatric guidelines use a modified ABCDE system: Amelanotic (not the typical dark color), Bleeding or Bump, Color that’s uniform, De novo (brand new) and any Diameter, and Evolution. A new bump that bleeds, itches, or changes over time should be evaluated. Children with a family history of melanoma should have their skin monitored more closely.
What Happens During a Professional Skin Check
A full-body skin exam typically takes 10 to 15 minutes. Your dermatologist will examine your skin from scalp to toes, including areas you can’t easily see yourself, like your back, the backs of your legs, and between your toes. They’ll use a dermatoscope, a handheld device that magnifies the skin starting at 10x and illuminates below the surface layer. Unlike a simple magnifying glass, a dermatoscope lets the examiner see structures deep into the skin that aren’t visible to the naked eye, including pigment patterns and blood vessel arrangements that help distinguish harmless moles from potentially cancerous ones.
If a spot looks concerning, the dermatologist may photograph it for future comparison or recommend a biopsy, which involves removing a small sample of skin under local anesthesia. In many cases, dermoscopy confirms that a spot is benign without any need for a biopsy at all. If you have many moles, your dermatologist may suggest total body photography, creating a baseline set of images so that any future changes can be detected by direct comparison.
How to Do a Self-Exam Between Visits
Monthly self-exams fill the gap between professional visits. Use a full-length mirror and a hand mirror to check your entire body, including your scalp (a blow dryer can help part your hair), the soles of your feet, between your fingers and toes, and under your nails. The goal isn’t to diagnose anything yourself. It’s to notice change. A mole that’s darker than it was last month, a new spot that wasn’t there before, or a sore that won’t heal are all worth bringing to your dermatologist’s attention.
Smartphone photos can help you track spots over time. Photograph any moles you want to monitor, note the date, and compare them month to month. The combination of regular self-checks and professional exams at the right interval for your risk level gives you the best chance of catching skin cancer early, when the five-year survival rate for melanoma is above 99%. By comparison, melanoma that has spread to distant parts of the body has a five-year survival rate of just 35%.