Tinea Capitis: Scalp Ringworm, Hair Loss, Diagnosis, and Treatment

What tinea capitis is

Tinea capitis is caused by dermatophyte fungi that grow in keratin, a protein found in skin and hair. In this condition, the infection affects the scalp and hair shaft. It is a form of ringworm, but unlike many ring-shaped rashes on the body, scalp ringworm often appears as scale, broken hairs, or an area of hair loss.

The infection is common in children, particularly school-age children, but adults can also get it. Different fungi can cause it. Some spread mainly from person to person, while others may come from infected animals. The type of fungus can influence which oral medicine is most likely to work, so a clinician may test a sample.

Scalp ringworm is contagious. It can spread through close contact with an infected person, a carrier who has few symptoms, or an infected pet. Shared combs, brushes, hats, towels, pillows, bedding, and hair accessories can also transmit fungal material. Having the infection does not mean a person is unclean; ordinary contact and shared objects can be enough for spread.

Signs and symptoms

Symptoms vary. One person may have mild flaking that resembles dandruff; another may develop noticeable hair loss or a very inflamed patch. Common signs include:

• Scaly patches: dry or flaky areas on the scalp, sometimes with itching or tenderness.
• Broken hairs: hairs may snap near the scalp, leaving short stubs or dark “black dots” where shafts have broken.
• Patchy hair loss: a localized area can look thinner or bald. Hair loss may be subtle, especially early on.
• Redness or darker discoloration: inflammation may be pink or red on lighter skin and may appear darker or less obvious on deeper skin tones.
• Inflamed bumps or pustules: some infections cause bumps around follicles, crusting, or drainage.
• Swollen lymph nodes: glands at the back of the neck or behind the ears may become enlarged, particularly with inflammation.

Not everyone has itch, and not every patch is ring-shaped. A scalp rash can spread beyond one area or coexist with a secondary bacterial infection. Some people first notice that a child has an area of broken hair or a patch that does not improve with ordinary dandruff care.

Kerion: a painful, swollen reaction

A kerion is a severe inflammatory form of scalp ringworm. It may look like a boggy, tender, swollen plaque with pustules or drainage. The area can be painful and may be mistaken for a bacterial abscess. Nearby lymph nodes may swell, and hair loss can be more pronounced.

A suspected kerion needs prompt medical assessment. Severe inflammation can damage hair follicles and leave permanent scarring hair loss if treatment is delayed. Do not squeeze, lance, or apply a steroid cream to a swollen scalp patch at home. A clinician can determine whether antifungal medicine, treatment for a secondary infection, or other care is needed.

How it spreads and who may be exposed

Fungi that cause tinea capitis can spread directly through head-to-head contact or indirectly through contaminated objects. Common shared items include combs, brushes, hats, helmets, hair accessories, towels, pillowcases, and bedding. Contact sports and crowded living settings can increase opportunities for transmission, but infection can occur in any household.

Some cases are linked to animals, including cats, dogs, and farm animals. If a pet has a scaly patch or hair loss, contact a veterinarian rather than trying a human antifungal product. An animal that carries fungus may have subtle signs, and the veterinary team can advise whether other pets or people need evaluation.

A person may spread infection before anyone recognizes the pattern. Tell close household contacts if a clinician confirms scalp ringworm, and follow advice about whether they need examination. Do not share hair-care items until the infection has been assessed and treatment guidance is in place.

Other scalp conditions can look similar

Flaking and hair loss do not identify the cause by themselves. Seborrheic dermatitis, scalp psoriasis, eczema, and bacterial folliculitis can all produce scale, redness, itching, or pustules. Alopecia areata can cause smooth patches of hair loss, while hair-pulling or repeated traction can also break hairs. Some people have more than one condition at the same time.

Patterns can offer clues but are not reliable enough for self-diagnosis. A rash that resembles dandruff may still be tinea capitis if hairs are breaking or thinning. A painful swollen patch may be an inflammatory fungal reaction or a bacterial infection. When the appearance is unclear, sampling hair and scale for fungal testing helps avoid using the wrong treatment.

It is particularly important not to treat a suspected fungal infection with a steroid cream before the cause is checked. Steroids may reduce redness for a short time while allowing ringworm to spread and making its appearance less typical. Tell the clinician about any shampoo, oil, cream, or home remedy already applied.

What families can do while treatment is arranged

Do not share combs, brushes, hair clips, hats, helmets, towels, pillowcases, or bedding. Wash towels and pillowcases regularly and clean hair-care tools. If a child attends school, sports, or childcare, ask the clinician for instructions that fit the setting rather than making assumptions about attendance or isolation. Keep hair and scalp items separate until you receive advice.

Check whether another household member has itch, scale, a bald patch, or broken hairs, and mention it during the appointment. Close contacts may need examination if symptoms are present, but they should not start prescription medicine simply because someone in the home has ringworm. If a pet has scaly skin or patches of missing fur, arrange a veterinary assessment; the fungus and treatment plan may differ from those in people.

Use a clean towel to dry the scalp and avoid sharing hair-care equipment. Do not aggressively scrub or scrape scale, shave the affected area, or apply several home treatments while waiting. These actions can irritate the scalp and do not replace oral antifungal treatment. If the infection is confirmed, follow the clinician’s cleaning and follow-up advice for the full course.

For a child, write down when the patch first appeared, whether it has changed, whether hair is breaking, and whether anyone else has symptoms. A clear photo from before treatment may help show the original pattern. This record supports the assessment but should not delay care for a tender, swollen patch or fever.

Diagnosis and testing

A clinician examines the scalp and hair, asks when the problem began, and checks for other affected areas or close contacts. They may use a dermatoscope (also called trichoscopy) to inspect broken hairs and scalp scale. Several conditions can resemble tinea capitis, including seborrheic dermatitis, scalp psoriasis, eczema, alopecia areata, bacterial folliculitis, and hair-pulling disorders.

To confirm the diagnosis, a clinician may collect scale, pluck affected hairs, or clip a small sample for laboratory testing. Microscopy can sometimes identify fungal structures quickly; fungal culture may take longer but can help identify the organism. A Wood lamp may show fluorescence with some species, but many cases do not fluoresce, so a normal result does not rule out infection.

Testing matters because treatments for fungus, psoriasis, eczema, and other causes differ. A rash that looks like dandruff may need an oral antifungal; a scaly patch without fungus may need another approach. If inflammation is severe, a clinician may begin treatment while a culture is pending and adjust it once results are available.

Treatment: why oral medicine is usually needed

Scalp ringworm infects the hair shaft and follicle, so creams, lotions, and powders cannot reach the infection adequately. The CDC says tinea capitis usually needs prescription antifungal medicine taken by mouth for one to three months. The exact medicine and duration depend on the suspected fungus, test results, age, medical history, and response.

Antifungal tablets are prescription medicines. A clinician may consider medicines such as terbinafine, griseofulvin, itraconazole, or fluconazole depending on the case and local guidance. Do not use leftover tablets, share medication, or stop early because itching improves. Follow the prescriber’s instructions and ask what side effects to watch for.

A medicated antifungal shampoo may be recommended alongside oral treatment to reduce spores on the scalp and help limit spread to others. Shampoo alone does not cure tinea capitis because it cannot clear fungus inside the hair shaft. Follow the product or clinician directions for how often to use it and how long to continue.

Do not use over-the-counter steroid creams on an undiagnosed scalp rash. Steroids can make ringworm worse and may change the rash’s appearance, making diagnosis more difficult. If you have already used a steroid, tell the clinician which product you used and for how long.

Reduce spread at home

While treatment is being arranged and during the course, avoid sharing combs, brushes, hats, helmets, towels, pillowcases, and hair accessories. Wash towels, pillowcases, and bedding regularly, and clean hair-care tools according to manufacturer instructions or clinician advice. Do not borrow another person’s hairbrush, even if no one else has visible symptoms.

Household members do not automatically need medication. Ask the clinician whether close contacts should be examined, especially if someone else has scale, itching, broken hairs, or a bald patch. A pet with hair loss or scaly skin should be checked by a veterinarian; do not apply human scalp medicine to an animal.

Once treatment starts, follow school, childcare, or sports guidance from the clinician and local health authority. Rules can vary by setting and by how well the affected person can avoid close contact or sharing equipment. Keep required protective gear clean and do not skip prescribed doses to attend an activity.

When to contact a healthcare professional

Contact a healthcare professional if you suspect scalp ringworm, particularly when scale is accompanied by broken hairs or patchy hair loss. Do not wait for a nonprescription cream to work: scalp ringworm generally needs a prescription oral antifungal. Arrange an appointment soon if a child or adult has persistent scale, itching, crusting, or hair loss that is worsening.

Seek prompt assessment for a tender, boggy, swollen area, pustules, drainage, rapidly increasing redness, or fever. These symptoms may indicate a kerion or secondary infection. Early treatment matters because severe inflammation can scar hair follicles and cause permanent hair loss.

If the rash spreads or does not improve during prescribed treatment, contact the prescriber. The diagnosis, fungus type, treatment duration, adherence, or possibility of another condition may need review. Do not increase the dose, switch to a different antifungal, or add a steroid without medical advice.

Hair regrowth and recovery

With appropriate early treatment, non-inflammatory tinea capitis usually has a good outlook. Hair may take time to regrow because the scalp needs to heal and hair grows gradually. A small amount of shedding or scale during recovery should be discussed at follow-up if it is worsening or if new patches are appearing.

Severe inflammatory infection is different: a kerion can injure follicles and leave permanent scarring hair loss. This is why a painful, swollen scalp patch needs prompt assessment rather than repeated home treatments. A clinician can explain what changes to watch for and whether additional testing is needed after treatment.

Complete the prescribed course even if the scalp looks better before the medicine is finished. Follow any recommendation for a repeat sample or follow-up visit. If symptoms persist, recur, or spread to another person or pet, contact the clinician and veterinarian as appropriate.

Frequently asked questions

References and further reading

• U.S. Centers for Disease Control and Prevention. Treatment of ringworm.
• U.S. Centers for Disease Control and Prevention. Clinical overview of ringworm.
• American Academy of Dermatology. Ringworm: who gets it and how it spreads.
• American Academy of Dermatology. Scalp conditions, including tinea capitis.
• DermNet. Tinea capitis: clinical features, diagnosis, and treatment.
• British Association of Dermatologists. Tinea capitis patient information.

Medical information notice: This article is for general education and does not replace diagnosis or treatment. Suspected scalp ringworm needs medical assessment because it usually requires prescription oral medicine. Seek prompt care for painful swelling, pus, fever, or rapidly worsening inflammation.