A red, scaly patch or bump that itches is the telltale sign of ringworm. The bump grows into a ring- or circle-shaped patch over time. It's possible that it'll develop into several rings. The inside of the patch is usually clear or scaly. The outside may be somewhat bumpy and raised. The initial symptom of scalp ringworm is usually a bump or small wound. It may become flaky and scaly, and your scalp may be tender and painful. You could notice that your hair begins to fall out in clusters.