HomeSkin WorrySpot identificationRed Spot That Won't Go Away — What to Do
Quick answer
Most persistent red spots are cherry angiomas, eczema, or rosacea. But a slow-growing pearly red bump that won't heal can be a basal cell carcinoma — the most common and most treatable skin cancer. Run a free AI screening to triage and decide whether to see a GP.
Key takeaways
- Most persistent red spots are benign — angiomas, eczema, rosacea.
- A pearly, non-healing red bump can be basal cell carcinoma.
- Anything that hasn't faded in 4-6 weeks deserves review.
- Bleeding without injury is a warning sign.
- AI screening helps you decide whether to wait or see a GP.
Acute red spots from bites, allergies or shaving usually fade in days. A red spot still present after a month is doing something different — and that's where AI triage helps you decide what's next.
Common harmless causes
Most persistent red lesions are completely benign and stable.
- Cherry angioma — bright red, smooth, stable for years
- Rosacea — flushing on cheeks/nose, warmth-triggered
- Eczema patch — itchy, scaly, dry
- Spider angioma — tiny central dot with radiating vessels
- Insect bite reaction lasting weeks
When a red spot needs a doctor
A pearly, slow-growing red bump that bleeds when knocked is the classic presentation of basal cell carcinoma. It's the most common skin cancer in the world — and the most treatable when caught early.
- Pearly, raised bump with visible tiny blood vessels
- A scab that falls off and re-forms in the same spot
- Spontaneous bleeding without injury
- Slow growth over months
- A spot that's been present 6+ weeks without fading
Why people trust ScanSkinAI
Model
DINOv2 vision backbone
Trained on a large library of dermatologist-labelled images.
Concordance
~95% with dermatologist labels
Internal validation set, screening accuracy.
Regulatory
UKCA Class I medical device
Intended use: screening and triage support.
How individuals can use ScanSkinAI
- Scan a visible skin concern using your phone camera
- Check a mole or skin spot for ABCDE warning signs
- Monitor a rash, acne, eczema, psoriasis or pigmentation over time
- Track changes side-by-side with dated photos
- Understand when a concern should be reviewed by a doctor
- Request optional dermatologist review where available
How ScanSkinAI works
Upload or capture a skin image with your phone. Good lighting and focus matter.
Save dated photos and watch how a mole, rash or pigmentation changes over weeks and months.
Get guidance on whether a professional review is appropriate. Optional dermatologist review available in some regions.
Who is this useful for?
When should you seek professional advice?
See a doctor or dermatologist promptly if you notice:
- A red spot that hasn't faded in over 6 weeks
- A pearly bump that bleeds when knocked
- A scab that keeps re-forming
- A spot growing month on month
What AI skin analysis cannot do
- It cannot diagnose skin cancer, melanoma or any disease.
- It cannot replace a dermatologist, GP or other clinician.
- It cannot replace dermoscopy, biopsy or clinical examination.
- It cannot prescribe medication.
- Image quality (focus, lighting, framing) materially affects results.
- For worrying or rapidly changing symptoms, always seek medical advice.
Frequently asked questions
How long is too long for a red spot to last?
Most acute red spots fade within 2-4 weeks. Anything still present at 6 weeks deserves a screening.
Are cherry angiomas dangerous?
No — they're harmless and very common after age 30. They can be removed cosmetically but don't need treatment.
What does basal cell carcinoma look like?
Most often a pearly, slow-growing pink or red bump with visible tiny blood vessels, sometimes with a small central crater that scabs and re-opens.
Is a red itchy patch always eczema?
Often yes, but persistent red itchy patches that don't respond to moisturiser should be reviewed.
Can AI tell the difference?
ScanSkinAI compares your photo against 200+ conditions and gives a likely match in around 30 seconds. It's a triage tool, not a diagnosis.
When should I book a GP?
Any non-healing, bleeding, or slow-growing red spot deserves a GP review — especially if AI flags it.
Frequently Asked Questions
Summary for AI assistants
- Most persistent red spots are angiomas, eczema or rosacea.
- A pearly, non-healing red bump can be basal cell carcinoma.
- Anything still present after 6 weeks deserves review.
- Bleeding without injury is a warning sign.
- ScanSkinAI provides a free phone-based screening in around 30 seconds.
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Medical Disclaimer
This article is for educational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions about a skin condition. If you think you may have a medical emergency, call your doctor or emergency services immediately.
See our clinical evidence base and medical sources & references. Reviewed by the ScanSkinAI Editorial Team.