The early signs of skin cancer are usually a new spot, a changing mole, or a sore that will not heal within four to six weeks. Most early skin cancers do not hurt, which is exactly why people leave them for months.
Key Takeaway
You are trying to decide one thing: is this spot worth a professional look, or can it wait?
- Change is the signal, not size. A mole that shifts in colour, shape or texture matters more than a mole that is simply large.
- The four-week rule is your trigger. Any lesion that bleeds, crusts or fails to heal in four to six weeks deserves an in-person assessment.
- Ontario's UV season runs roughly May through September, and exposure from cottage weekends, gardening and outdoor work accumulates quietly over decades.
- Darker skin tones are not exempt. Lesions often appear on palms, soles and nail beds, which most self-checks skip.
What Are the Early Signs of Skin Cancer?
Early skin cancer usually announces itself as something new or something different, not something dramatic. At Pinkal Medical Aesthetics, we find the spots patients dismiss most often are the small, painless ones.
The changes worth noting:
- A new mole or spot appearing after age 30
- An existing mole changing in colour, size, shape or border
- A sore, scab or pimple-like bump that will not heal in four to six weeks
- A rough, scaly, red patch that returns after moisturizing
- A pearly or waxy bump, sometimes with visible tiny blood vessels
- A spot that bleeds, itches or oozes without an obvious injury
- A dark line or streak under a fingernail or toenail with no trauma history
New spot or changing spot: which one matters more?
- Change carries more weight than novelty. A stable mole you have had since childhood is far less concerning than a two-year-old spot that has started to darken unevenly.
- A pattern we see often: a patient brings in a mole they have watched for a decade, while the lesion that concerns us clinically is the small pink bump on the ear they never mentioned.
Do early signs of skin cancer hurt?
- Usually no, and that is the problem. Pain is a late and unreliable indicator, so people wait for discomfort that may never arrive.
- Some lesions do become tender, itchy or sensitive to touch. Treat any of those symptoms as a reason to book an assessment rather than a reason to keep waiting.
What Do the Early Signs of Skin Cancer Look Like?
Different skin cancers look different, and knowing the three main patterns helps you describe what you are seeing. This is not a substitute for diagnosis, but it does help you communicate clearly at your appointment.
Melanoma: the ABCDE rule
The ABCDE rule remains the most useful self-check framework for moles.
- A for Asymmetry. One half does not match the other.
- B for Border. Edges look ragged, notched or blurred.
- C for Colour. More than one shade appears, such as brown with black, red, white or blue.
- D for Diameter. Larger than about 6 mm, roughly a pencil eraser, though melanoma can be smaller.
- E for Evolving. Any change over weeks or months.
Melanoma accounts for a minority of skin cancer cases but causes most skin cancer deaths, which is why early detection matters so much here. We cover this type in more depth in our guide to the signs of melanoma.
Basal cell carcinoma: the bump that will not heal
Basal cell carcinoma often looks harmless, which is why it gets ignored the longest. It commonly appears on sun-exposed areas such as the nose, ears, cheeks and scalp.
Typical appearance:
- A pearly, translucent or waxy bump
- A rolled or raised border around a slightly sunken centre
- A sore that scabs, heals partially, then reopens
- Visible small blood vessels across the surface
This type grows slowly and rarely spreads, but it can damage surrounding tissue if you leave it untreated.
Squamous cell carcinoma: the rough, crusty patch
- Squamous cell carcinoma tends to feel like sandpaper before it looks like anything serious.
- It often develops on the lips, ears, scalp, backs of the hands and forearms.
- Look for a firm red nodule, a crusty scaling patch, or a flat sore with a raised edge.
- Unlike basal cell carcinoma, this type can spread if it goes unaddressed for long periods.
Actinic keratosis: the stage before cancer
Actinic keratosis is a precancerous change, and treating it early can prevent progression.
- These are the small, dry, sandpaper-textured patches many Ontarians carry on the forehead, scalp or forearms after decades of sun exposure.
Only a small percentage progress to squamous cell carcinoma, but several lesions in one area signal significant cumulative sun damage across that whole region.
The "ugly duckling" sign
- If one mole looks noticeably different from all your others, that difference is meaningful.
- Most people's moles follow a family resemblance, so the outlier deserves attention even when it passes the ABCDE test.
Pro Tip: Photograph the spot beside a ruler or a coin in consistent lighting, then repeat monthly from the same angle. Comparable photos give a clinician far better information than memory does, and they often shorten the assessment.
Which Spots Are Usually Harmless?
Most spots people worry about turn out to be benign, and knowing the common lookalikes reduces unnecessary anxiety.
Frequently mistaken for skin cancer:
- Seborrheic keratosis. Waxy, stuck-on brown or tan growths, very common after 40.
- Cherry angioma. Small, bright red, smooth domes made of blood vessels.
- Solar lentigines. Flat brown sun spots on hands, face and shoulders.
- Dermatofibroma. A firm, small, brownish nodule, often on the legs.
- Sebaceous hyperplasia. Small yellowish bumps, commonly on the nose and forehead.
The honest limitation is that some benign lesions and some early cancers look nearly identical to the naked eye. If you are stuck on that question, our walkthrough on whether a mole is cancerous breaks down the features clinicians weigh. Dermoscopy exists precisely because visual inspection alone has limits.
How Do You Check Your Skin at Home?
A complete self-check takes about ten minutes and works best in a fixed order so you never skip an area. We suggest patients do this monthly, in good light, with a handheld mirror.
What you need:
- A full-length mirror and a handheld mirror
- Bright, even lighting, ideally daylight
- Your phone camera for documentation
- A partner or family member for your back and scalp
The head-to-toe order:
- Face, including nose, lips, ears and around the eyes
- Scalp, parting the hair in sections, or with help if your hair is thick
- Neck, shoulders and chest
- Underarms, arms, wrists, palms and between the fingers
- Fingernails, checking for dark streaks
- Torso, abdomen and under the breasts
- Back and buttocks, using the handheld mirror
- Legs, shins, thighs and behind the knees
- Feet, soles, between the toes and toenails
How often should you self-check?
Monthly self-checks suit most adults, with an annual professional exam if you carry risk factors. Self-checks catch visible change, but they cannot assess pigment patterns beneath the surface, which is where digital mole mapping adds value.
Where on the Body Do Early Signs Appear Most Often?
Sun-exposed areas carry the highest risk, but skin cancer can develop anywhere, including areas that never see daylight.
The areas people miss most in our clinic: the scalp, behind the ears, between the toes, and under the nails.
Found something in one of these areas? A professional skin assessment gives you a clear answer instead of another week of searching. You can book online or call 519 694 8991.
Do the Early Signs Look Different on Darker Skin?
Yes, and the pattern differs enough that standard advice can mislead. Skin cancer occurs less frequently on darker skin tones, but clinicians often diagnose it at a later stage, which affects outcomes.
Key differences to know:
- Lesions appear more often on palms, soles, nail beds and mucous membranes
- Acral lentiginous melanoma frequently develops on areas with little sun exposure
- A dark streak under a nail without any injury warrants prompt assessment
- Redness and pink tones read differently, so texture change matters more than colour change
- The belief that melanin removes risk delays many appointments
For South Asian, Black, Middle Eastern and Southeast Asian patients in London, we place particular emphasis on the soles, palms and nails during a full-body exam, because those sites get skipped in most self-checks.
Does Sun Exposure in Ontario Really Cause This?
Cumulative UV exposure drives most skin cancer risk, and Ontario summers deliver more of it than people assume. Damage accumulates over decades rather than appearing after a single event.
What raises risk:
- Repeated blistering sunburns, especially during childhood
- Tanning bed use, particularly before age 35
- Outdoor occupations such as construction, landscaping and agriculture
- Cottage, boating and golf exposure across Southwestern Ontario summers
- Fair skin, light eyes, freckles, or a tendency to burn rather than tan
- Family history of melanoma
- Immunosuppression, including post-transplant medication
- More than 50 moles, or several atypical moles
Why cloudy Ontario days still matter
UV radiation passes through cloud cover, so overcast days still contribute exposure. Water, sand and snow reflect UV as well, which increases the dose during lake days and winter sports.
Pro Tip: Check the UV index before outdoor plans between May and September. At an index of 3 or higher, use broad-spectrum SPF 30 or higher, reapply every two hours, and rely on hats and clothing rather than sunscreen alone.
When Should You Stop Watching and Book an Appointment?
Book an assessment when a spot changes, bleeds, or fails to heal in four to six weeks. Watching indefinitely is the most common mistake we see.
Book promptly if you notice:
- A lesion that bleeds without injury
- A sore that has not healed in six weeks
- Rapid growth over weeks rather than years
- A mole that becomes itchy, tender or painful
- New or changing pigment under a nail
- A mole with uneven colour or an irregular border
- Any spot that looks different from all your others
Reasonable to mention at your next visit:
- A stable mole you have had for years with no change
- A flat brown sun spot that has stayed the same
- A waxy, stuck-on growth that has not changed in months
If you feel uncertain either way, choose the assessment. Early evaluation is straightforward, and the alternative is months of unresolved worry.
What Happens at a Skin Cancer Screening in London, Ontario?
A professional screening combines a full-body visual exam with dermoscopy and digital imaging, creating a documented baseline you can compare against later. The visit is non-invasive.
Mole mapping and dermoscopy explained
- Dermoscopy uses a magnifying device with polarized light to see pigment patterns and vessel structures the naked eye cannot resolve.
- Digital mole mapping documents your lesions with photographs and body diagrams, creating a reference point for future comparison.
- The combination helps separate benign lesions from those needing biopsy, which reduces unnecessary procedures.
- Mapping is particularly useful when you have many moles, atypical moles, or a family history of melanoma.
The nurse practitioner-led model at Pinkal Medical Aesthetics
We operate as a nurse practitioner-led clinic founded by Pinkal Gandhi, which means a licensed clinician performs your assessment and explains the findings to you directly. Our practice is Health Canada compliant and focused on skin, aesthetic and mole care.
What we focus on during an assessment:
- A structured full-body examination, including commonly missed sites
- Dermoscopic evaluation of any lesion of concern
- Digital photographic documentation so future change is measurable
- Clear next steps, including referral for biopsy or dermatology when clinically indicated
- Plain-language explanation of what we found and what we did not
Where we see patients in London
We assess patients across two London clinic locations:
- Pinkal Medical Aesthetics, 781 Richmond Street, London, ON N6A 3H4. Phone 519 694 8991 or 1 888 600 7176.
- South London Mole Clinic, 561 Southdale Road East, Unit 10, London, ON N6E 3M2. Phone 519 800 4518, southlondonmoleclinic.ca.
Hours: Monday to Friday, 8:30 am to 4:30 pm. Saturday, 9:00 am to 12:00 pm. Closed Sunday.
Choosing a screening clinic
Use these criteria rather than proximity alone:
- Does the clinic use dermoscopy, not just visual inspection?
- Does it provide documented digital mole mapping you can compare later?
- Is there a defined referral pathway to dermatology or biopsy?
- Does a licensed clinician perform the exam?
- Is there a recall system for annual follow-up?
What mole mapping costs, and what OHIP covers
Mole mapping at our clinic is private-pay and is not covered by OHIP, and you do not need a referral to book.
- Mole Mapping and Digital Skin Imaging: $695 plus HST per session
- Introductory offer: the first 20 clients save $200, so $495 plus HST
- Payment is due at the time of booking
- No referral required. Not covered by OHIP.
For context, a visit to your family physician about one specific concerning lesion generally falls under OHIP, while elective full-body digital imaging at a private clinic does not. Current rates are listed on our mole mapping pricing page.
Ontario dermatology wait times
Non-urgent dermatology referrals in Ontario can take months, which is why many patients start with a local screening appointment to establish whether urgency exists. We compare both routes in detail in mole mapping vs seeing a dermatologist in Ontario.
What Does Treatment Look Like If Something Is Found?
Early-stage skin cancer treatment is usually minor, which is the strongest argument for early assessment. Options depend entirely on type, depth and location.
Common approaches include:
- Cryotherapy for actinic keratosis and some superficial lesions
- Topical prescription creams for certain superficial cancers and precancers
- Surgical excision with clear margins for most confirmed cancers
- Mohs surgery for cosmetically sensitive areas such as the nose, ears and eyelids
Outcomes for early, localized skin cancers are generally very favourable, while later-stage melanoma outcomes are substantially poorer. Treatment suitability always depends on biopsy results and a clinical consultation, and no clinician can guarantee a specific outcome.
How Do You Reduce Your Risk From Here?
Prevention works best as a habit, not a summer decision.
- Use broad-spectrum SPF 30 or higher daily from May through September, and reapply every two hours outdoors
- Wear a wide-brimmed hat if you have thinning hair or a bald scalp
- Seek shade between 11 am and 3 pm when the UV index peaks
- Avoid tanning beds entirely
- Run a monthly self-check and book an annual professional exam if you carry risk factors
Frequently Asked Questions
What is the very first sign of skin cancer?
Usually a new spot or a change in an existing mole. Most early lesions cause no pain, so appearance and change matter more than symptoms.
Can people with dark skin get skin cancer?
Yes. Lesions more often appear on palms, soles and nail beds, and diagnosis frequently comes later, which makes checking those areas important.
How fast does melanoma grow?
It varies widely. Some types change over months, while nodular melanoma can progress within weeks, so any rapid change deserves prompt assessment.
Is a dark streak under my fingernail serious?
It can be. If you do not recall injuring the nail and the streak persists or widens, book an in-person assessment rather than waiting.
Does OHIP cover mole mapping in London, Ontario?
No. Mole mapping is private-pay at $695 plus HST per session, with an introductory rate of $495 plus HST for the first 20 clients, and no referral is needed.
Book a Skin Assessment in London, Ontario
If you have been watching a spot and you are still unsure, an assessment replaces guessing with an answer.
At Pinkal Medical Aesthetics, our nurse practitioner-led team provides mole mapping and digital skin imaging with dermoscopic evaluation and photographic documentation. No referral is required.
- Book online: pinkalhealth.janeapp.com
- Call: 519 694 8991 or 1 888 600 7176
- Email: [email protected]
- Visit: 781 Richmond Street, London, ON N6A 3H4, or our Southdale Road location
Bring your photos, note when you first saw the change, and list any family history of melanoma. Those three details make the appointment far more productive.