Tinea capitis vs alopecia areata is one of the most practical patchy-hair-loss comparisons on this site because both can present as localized non-scarring hair loss, especially in children. But the mechanism is completely different. Tinea capitis is a fungal scalp infection. Alopecia areata is an autoimmune condition. That difference matters because the clues, the tests, the contagiousness question, and the treatment pathway are not the same.
Medical note: This article is for general education and does not provide personal medical advice. Do not assume every smooth or broken patch is alopecia areata, and do not ignore scale or scalp tenderness in a child. If the scalp is painful, swollen, crusted, rapidly worsening, or the diagnosis is unclear, start here: When to See a Doctor. For the broad diagnostic roadmap, start here: How Hair Loss Is Diagnosed.
Quick navigation
- Key takeaways
- Why these two get confused
- The core difference
- Tinea capitis clues
- Alopecia areata clues
- Trichoscopy: the practical separator
- How doctors check tinea capitis vs alopecia areata
- What to do now
- When to see a doctor
- FAQ
- References
Key takeaways
- Both conditions can look patchy: that is why they are commonly confused.
- Tinea capitis is infectious: it is a fungal scalp infection and can be contagious.
- Alopecia areata is autoimmune: it causes patchy hair loss without fungal infection.
- Scale matters: scaling pushes the differential toward tinea capitis more than classic alopecia areata.
- Broken hairs matter: tinea capitis often causes broken hairs, black dots, and rough-looking patches rather than only smooth hairless skin.
- Trichoscopy matters: comma hairs, corkscrew hairs, and zigzag hairs support tinea capitis, while yellow dots, black dots, and tapering/exclamation-mark hairs support alopecia areata.
- Children deserve extra attention: tinea capitis is especially common in children, and a child with patchy loss plus scale should not be assumed to have alopecia areata first.
- Related on this site: Tinea Capitis: Scalp Ringworm Signs & Treatment • Alopecia Areata: Patchy Hair Loss Signs & Treatment • Non-Scarring Alopecia • How Hair Loss Is Diagnosed • When to See a Doctor.
Why these two get confused
At first glance, both can present as a patch of reduced hair density. That is why diagnosis cannot rest on “there is a patch” alone. The real question is whether the patch fits an infectious broken-hair pattern or an autoimmune smooth-patch pattern.
The core difference
Tinea capitis is a dermatophyte infection of the scalp. The most useful clues are scale, broken hairs, possible itch, and sometimes neck lymph nodes or inflammatory change.
Alopecia areata is an autoimmune patchy alopecia. The most useful clues are smooth patches, the absence of heavy scale in classic cases, and a trichoscopy pattern more consistent with autoimmune hair loss.
Tinea capitis clues
- Scale on or around the patch
- Broken hairs and sometimes black dots at scalp level
- Itch is common
- Neck lymph nodes may be enlarged
- In inflammatory cases, the scalp may become boggy, swollen, or pustular
- Often more common in children
Alopecia areata clues
- Smooth patchy hair loss
- Often little or no heavy scale in classic cases
- Exclamation-mark/tapering hairs, yellow dots, and black dots may be present
- May affect scalp, eyebrows, eyelashes, or beard
- No fungal spread history is needed to explain it
Trichoscopy: the practical separator
This is often the most useful practical section. In tinea capitis, the high-value trichoscopy clues include comma hairs, corkscrew hairs, zigzag hairs, broken hairs, and often perifollicular or diffuse scaling. In alopecia areata, the more characteristic pattern includes yellow dots, black dots, broken hairs, short vellus hairs, and tapering/exclamation-mark hairs.
A practical shortcut is this: fungal-shaped shaft changes plus scale favor tinea capitis, while a constellation of classic autoimmune trichoscopy signs favors alopecia areata.
How doctors check tinea capitis vs alopecia areata
The workup usually begins with history + examination.
- Is there scale?
- Are the hairs broken?
- Is there itch, tenderness, or lymph node enlargement?
- Are classic AA clues present? yellow dots, tapering hairs, smooth patches
- Does the child need fungal confirmation testing? culture or other fungal testing may matter more in suspected tinea than in classic AA
The practical goal is to avoid mistaking an infectious scalp disorder for autoimmune alopecia, or missing autoimmune alopecia because a few broken hairs created confusion.
What to do now (practical plan)
- Check for scale first: this is one of the fastest practical clues.
- Look closely for broken hairs: this pushes the diagnosis toward tinea capitis more than classic AA.
- Ask about itch and tenderness: infection often behaves differently from AA.
- Use trichoscopy early: comma/corkscrew hairs versus yellow dots/exclamation-mark hairs can clarify the picture quickly.
- Do not assume every child with a smooth-looking patch has AA: tinea remains one of the most important pediatric look-alikes.
- Get fungal testing when the story fits: this matters more in suspected tinea than in classic AA.
When to see a doctor
- Painful, swollen, boggy, or pustular scalp
- Patchy loss with scale in a child
- Rapid worsening over days to weeks
- Fever or the child seems unwell
- Unclear diagnosis between tinea capitis, alopecia areata, and other patchy alopecias
Start here: When to See a Doctor.
FAQ
What is the simplest difference between tinea capitis and alopecia areata?
Tinea capitis is a fungal scalp infection that often causes scale and broken hairs. Alopecia areata is autoimmune and more often causes smooth patchy loss without heavy scale.
What trichoscopy clues strongly support tinea capitis?
Comma hairs, corkscrew hairs, and zigzag hairs strongly support tinea capitis.
What trichoscopy clues strongly support alopecia areata?
Yellow dots, black dots, short vellus hairs, and tapering/exclamation-mark hairs support alopecia areata.
Why are children mentioned so often in this comparison?
Because tinea capitis is especially common in children, so patchy loss with scale in a child deserves careful infectious workup.
Does every patch with black dots mean alopecia areata?
No. Black dots can appear in both conditions, which is why the full pattern matters more than one clue alone.
References (trusted sources)
- DermNet: Tinea capitis — clinical clues, scaling, broken hairs, lymph nodes, and inflammatory variants
- DermNet: Alopecia areata — autoimmune patchy hair loss and differential diagnosis
- DermNet: Trichoscopy of localised noncicatricial hair loss
- PMC: Different Trichoscopic Features of Tinea Capitis and Alopecia Areata in Pediatric Patients
- PMC: Trichoscopy of Tinea Capitis — systematic review
- PMC: Trichoscopy pattern in alopecia areata — systematic review
- AAD: Ringworm of the scalp (tinea capitis)
Last updated: March 19, 2026.
