Tests and diagnosis

By Mayo Clinic Staff

Your doctor can often make a diagnosis of ringworm or another condition affecting the scalp based on a visual examination of the scalp and your answers to questions.

If the diagnosis is uncertain, your doctor may take a sample — hairs, a swab from the scalp or hair, or a scraping of scaly skin — for examination under a microscope, which can reveal the presence of fungi.

Feb. 21, 2014