Tinea Capitis (Scalp Ringworm) By Denise M Aaron, MD, Dartmouth Geisel School of Medicine Reviewed / Revised Sep 2021 | Modified Sep 2022 View Patient Education Diagnosis Treatment Key Points Topic Resources Skin Lesion (Scales) Tinea Capitis on Dark Skin Tinea Capitis (Kerion) Kerion on Dark Skin Tinea capitis is a dermatophyte infection of the scalp.