How is preauricular sinus infection treated?

Infection of a preauricular sinus is a relatively uncommon condition. Once this condition occurs, prompt medical evaluation at a hospital is essential. Diagnosis should be based on relevant examinations and the patient’s clinical symptoms, followed by appropriate management. How is preauricular sinus infection treated?

How Is Preauricular Sinus Infection Treated?

Preauricular sinus infection can be managed medically—for example, with oral antibiotics. In cases of localized inflammation without abscess formation, initial treatment typically involves oral antibiotic therapy. If the infection progresses, intravenous antimicrobial therapy may be required. When a distinct abscess develops at the site of the preauricular sinus, incision and drainage are usually necessary. Only through surgical incision can purulent secretions be effectively drained, and any granulation tissue within the abscess cavity be thoroughly removed.

A preauricular sinus arises from incomplete fusion or closure of the first branchial groove during embryonic development—specifically, during formation of the auricular hillock from the first and second branchial arches. Clinical manifestations of preauricular sinus infection include local erythema, swelling, warmth, and tenderness; in more advanced cases, purulent discharge may also occur.

Inflammation of the preauricular sinus tends to recur. Such recurrent inflammation may result from water exposure to the area, repeated mechanical pressure (e.g., squeezing), or inflammatory irritation. Preauricular sinuses are primarily congenital anomalies resulting from abnormal embryonic development. When infected, they may become swollen and painful and may progress to abscess formation. Mild infections can often be managed with oral antibiotics; however, if an abscess has formed, surgical excision is generally indicated—and both the sinus tract and its associated epithelialized lining must be completely removed. We hope this information is helpful to you!