Updated 2026-09-29 · Educational only, not a diagnosis
Medical facts, drug details and treatment options on this page have not been independently medically reviewed.
What it is
A contagious fungal infection of the scalp causing scaly patches and broken hairs, most common in children.
Who gets it
Mostly children; spreads via shared combs, hats and pets.
Signs to look for
- Scaly patches with broken hairs ('black dots')
- Swollen lymph nodes
- Sometimes a painful boggy swelling (kerion)
Common causes and triggers
- Dermatophyte fungi
How it is diagnosed
- Fungal culture or microscopy
Treatment and care options
These are the options commonly discussed. What suits you depends on your diagnosis — a dermatologist can help you choose.
- Oral antifungal medicine (shampoo alone isn't enough)
- Antifungal shampoo to reduce spread
Outlook
Hair regrows with prompt treatment.
When to see a doctor
Yes — it needs prescription medicine.
Not sure what's behind your thinning?
This content is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease. Speak with a qualified healthcare professional about your individual situation.