Aim Acute Suppurative Thyroiditis (AST) is a rare, potentially life-threatening infection, with approximately 200 cases reported in the literature. Management is largely based on case reports and typically includes broad-spectrum antibiotics, aspiration or surgical intervention. This case report aims to describe an uncommon presentation of AST and review diagnostic, microbiological, and management considerations in current literature. Method A single-patient case report was undertaken, detailing presentation, imaging, microbiological findings, and treatment. The case is discussed in the context of published reports on the pathogenesis, diagnosis, and management of AST, including the role of congenital anomalies. Results A previously well 20 year old female presented with acute-onset painful anterior neck swelling, dysphagia, odynophagia and subjective dyspnoea. CT Neck showed a large multiloculated thyroid collection with tracheal deviation, prompting ICU transfer for airway monitoring. Blood tests showed thyrotoxicosis and carbimazole was initiated. Ultrasound confirmed a large left thyroid collection causing compressive symptoms. Ultrasound-guided aspiration yielded 18mls of frank pus. Microscopy revealed oral cavity organisms, raising suspicion for an underlying piriform sinus fistula. Broad-spectrum antibiotics were commenced, later rationalised to ceftriaxone and metronidazole. Flexible nasoendoscopy and CT Neck did not find a sinus tract. She is awaiting dynamic imaging to identify an occult sinus and guide definitive surgical management. Conclusion AST is a rare, serious infection of the thyroid gland, often linked to anatomical variants. Prompt recognition, imaging, and antimicrobial therapy are essential to prevent complications. This case highlights the effectiveness of conservative management when airway stability is maintained and reinforces the importance of evaluating for structural anomalies to guide long-term management and assess recurrence risk