How to grow hair back after a scalp fungal infection
Hair loss from a scalp fungal infection — most often tinea capitis, or scalp ringworm — is usually reversible once the underlying infection is properly treated. The fungus (a dermatophyte) damages hair shafts at the infected patch, causing a circular bald spot that can come with redness, scaling, and itching, and occasionally fever if the infection is more severe. The key point is that the hair loss itself isn’t permanent damage to the follicle in most cases — it’s a side effect of the active infection, so clearing the infection is what allows regrowth.
Treat the infection first
Because the fungus lives inside the hair shaft, not just on the skin surface, a proper diagnosis and prescription treatment from a doctor is the actual path to regrowth — not a specific shampoo or home remedy on its own.
Oral antifungal medication
This is the primary treatment for tinea capitis in almost all cases. Doctors commonly prescribe griseofulvin or terbinafine, with fluconazole and itraconazole as alternatives, dosed and timed according to the patient’s age, weight, and the specific fungus involved. A full course typically runs several weeks — stopping early because the visible patch looks better is one of the most common reasons the infection returns.
Topical antifungal ointment
For more localized or milder cases, a dermatologist may add a topical antifungal ointment applied to the patch and the surrounding area, generally alongside — not instead of — oral treatment, since topical products alone rarely clear an infection that has reached the hair shaft.
Antifungal shampoo
A shampoo containing ketoconazole or selenium sulfide, used two to three times a week, helps reduce fungal spore shedding from the scalp and lowers the chance of spreading the infection to others while treatment is underway. It’s a genuinely useful supporting step, but on its own it’s unlikely to fully clear an established infection.
Supporting habits during treatment
Fungi thrive in warm, damp, unhygienic conditions, so a few habits help alongside medical treatment rather than replace it:
- Keep the scalp clean and thoroughly dry after washing — damp hair and heat both favor fungal growth.
- Avoid sharing combs, hats, pillowcases, and towels while infected, since tinea capitis spreads easily through contact.
- Wash hands after contact with an infected person, pet, or shared surface, since it can transfer between people and, less commonly, from pets.
- Check close contacts and household members, especially children, since it spreads quickly within families and classrooms.
When other treatments may be considered
In severe, inflamed cases (a condition called a kerion), a doctor may consider a short course of oral steroids alongside antifungal treatment to reduce inflammation and scarring risk. Low-level laser therapy is sometimes discussed for hair regrowth support after infection clears, though the evidence for it in this specific context is limited — it’s not a standard first-line treatment. Both should only be considered under a doctor’s guidance.
What to expect for regrowth
Once the infection is properly treated, hair typically starts regrowing within the following weeks to months. Scalp hygiene, gentle handling of the area, and adequate nutrition support the process, but they don’t substitute for completing the prescribed antifungal course — that’s what actually resolves the infection causing the hair loss. If regrowth hasn’t started within a few months of finishing treatment, or if the patch shows scarring, see a dermatologist, since scarred follicles may need a different approach.