A scalp sore can appear as crusting, redness, drainage or an open lesion on the scalp. This page summarizes common causes, how clinicians evaluate these findings, which specialists may be involved and warning signs that need prompt attention. For a personal diagnosis and treatment plan, consult a health professional.
Scalp sores have many possible causes. Frequent options include bacterial or fungal infections, viral lesions, inflammatory conditions such as dermatitis or eczema, folliculitis (inflamed hair follicles), trauma and chronic skin diseases like psoriasis. Allergic or autoimmune reactions can also produce sores. Characteristics such as pain, drainage, crusting and whether lesions are single or widespread help narrow the cause.
A clinician will inspect the lesion, ask about how long it’s been present and any associated symptoms (pain, fever, scalp itching or loss of hair). Tests may include skin swabs or cultures, fungal studies, blood tests and—less commonly—a skin biopsy. Photographs and a history of recurring or spreading lesions help guide diagnosis. These steps are for general assessment; only a healthcare provider can determine a definitive diagnosis.
Primary care or family medicine is often the first point of contact. Depending on findings, referral to Dermatology and Venereal Diseases or Infectious Diseases and Clinical Microbiology may be recommended. Dermatology is typically prioritized for chronic, treatment‑resistant or suspicious lesions; infectious disease specialists can advise when an infection is suspected or results need detailed interpretation.
Keep the area clean and avoid harsh hair products, vigorous scrubbing or picking at the sore, which can delay healing and raise infection risk. Avoid sharing combs, hats or headgear to reduce potential spread. If symptoms worsen, new signs appear, or you develop fever or rapidly expanding redness, seek medical care promptly.
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