What should you know about a random circular bald spot on your head?

A sharply outlined, smooth patch may be a presentation of alopecia areata. Itching, scale, tenderness, black dots, or hairs that snap can occur with scalp ringworm. A patch under repeated tension or rubbing may relate to hairstyle, equipment, or pressure. The circle is a useful observation, not a diagnosis; the condition presenting with the patch must be identified from the scalp and hair findings.

Check for additional patches and changes around the ears, eyebrows, or nails. A healthcare professional may use magnification and, when infection is a concern, arrange a sample or other targeted test. Avoid applying multiple active products before assessment because they can irritate the skin and obscure its appearance.

Photograph the area and gently compare its size over time. Use a mild cleanser, keep combs and hats personal, and stop tight pulling or repeated friction. Do not scratch or pick at scale. Book a dermatology appointment if the patch remains visible, enlarges, or is joined by symptoms. A hair transplant does not address an undiagnosed inflammatory or infectious cause, so it should not replace evaluation.

Seek prompt advice if the scalp is very painful, swollen, draining, or associated with fever. Arrange timely review when hair loss spreads quickly, multiple areas develop, or the skin looks smooth and shiny rather than simply hairless. Children with a scaly patch or broken hairs should be assessed because contagious scalp infection may need specific treatment.

Ask whether the surface looks more consistent with alopecia areata, infection, or traction; whether testing is required; how to protect household contacts; and what signs would show that treatment is working.