SKIN360AI · SKIN-CANCER GUIDE
Is It Skin Cancer or Something Harmless? A Guide to Common Spots
Most spots are harmless — but some look alike. A guide to telling common benign lumps and marks from skin cancer.
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Written & reviewed by Dr Rupinder Singh Walia — MBBS, FRACGP, Dip. Dermatology (Cardiff, UK) · AHPRA MED0001647256 · special interest in skin cancer medicine & dermoscopy
The great majority of skin lumps and marks are completely harmless. The difficulty is that a few skin cancers can look like ordinary spots — and plenty of harmless spots look alarming. This guide helps you tell the common ones apart, and know when a spot is worth a doctor’s eye.
Related: freckles and skin cancer.
Common harmless spots (and their guides)
The universal signal to get checked
Whatever the spot, the signs that move it from “probably fine” to “worth checking” are the same: new, changing, growing, bleeding, itching, or won’t heal — or a mole that stands out from your others.
When you can’t tell
Telling a harmless spot from an early cancer can be genuinely hard by eye. That is exactly what an Australian GP with a special interest in skin cancer medicine using dermoscopy is trained for. Get a spot reviewed — $49.
Not a spot but a rash or patch that won’t settle? A doctor can review a photo of that too.
Not a diagnosis; cannot rule cancer in or out.
Worried about a mole, mark or changing skin area?
Most skin-cancer advice tells you to watch for change. Skin360AI helps you keep photos of one or more spots connected over time. A spot can be a mole, freckle, mark, lump, sore, patch or any skin area you want to watch. It is not a diagnosis and cannot rule skin cancer in or out.
If a lesion is new, changing, bleeding, non-healing or worrying you, arrange an in-person GP or skin-cancer clinic assessment.
Frequently asked questions
How do I know if a spot is skin cancer or harmless?
You often cannot tell by eye alone. Reassuring signs are that a spot is stable, symmetrical, even in colour and looks like your others. Get one checked if it is new, changing, growing, bleeding, itching or will not heal.
Which harmless spots are most often mistaken for skin cancer?
Seborrhoeic keratoses, moles, skin tags, cherry angiomas, milia and age spots are all commonly mistaken for skin cancer — and occasionally a skin cancer is mistaken for one of them.
When should I get a spot checked?
Whenever it is changing or unusual, or simply worrying you. A quick photo review can tell you whether it needs an in-person look.
Check and watch the spots you care about over time
Use the free AI-assisted skin check to save photos of moles, marks, lumps, sores, patches or other skin areas you want to watch. A photo record is not a diagnosis or a cancer all-clear.
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A structured photo record is not a diagnosis, cannot exclude skin cancer and does not replace an in-person examination.Medically reviewed by
Dr Rupinder Singh Walia (MBBS, FRACGP, Diploma in Dermatology — Cardiff University, UK; AHPRA MED0001647256). Last reviewed September 2026. This information is general and is not a diagnosis; it cannot rule skin cancer in or out. See your GP or a skin-cancer clinic in person for anything that concerns you.