An abscess is a confined accumulation of pus in a tissue, organ or body cavity surrounded by an intact pus wall as a result of necrosis and liquefaction of diseased tissue during an acute infection. The common causative organism is Staphylococcus aureus. The abscess may originate from an acute purulent infection or from the transfer of pathogenic bacteria from a distant primary source of infection via the bloodstream or lymphatic vessels. Acute bacterial endocarditis, staphylococcal infections can be complicated by lung abscesses, brain abscesses and other migrating abscesses, which manifest as cough, dyspnea, convulsions and hemiplegia. What symptoms are easily confused with migrating abscesses? Abscess breaking into the chest cavity: common in elderly people with chest pain from lung abscess, caused by inflammatory lesions involving the pleura, with pain worsening during breathing. If the abscess breaks into the chest cavity, it can form an abscess chest, pneumothorax, or an encapsulated abscess chest due to fibrin wrapping, and the patient has restricted respiratory movement and increased shortness of breath. Septicemia or multiple migratory abscesses: is the basis for the diagnosis of anaerobic pneumonia in the elderly. Anaerobic lung infection is an inflammation of the trachea, bronchi, lung parenchyma, and pleural cavity caused by anaerobic bacteria. Anaerobic bacteria are diverse and vary in pathogenicity, and are one of the common pathogens causing lung infections. Prevertebral and paravertebral soft tissue swelling or abscess: it is one of the important features in the diagnosis and differential diagnosis of spinal tuberculosis, especially the calcification of abscesses is often specific. Paravertebral soft tissue swelling soft tissue swelling varies in severity and manifests as a limited thickening, oval or round mass of soft tissue adjacent to the invaded vertebral body with uniform density and thin walled envelope after enhancement. Spinal rib angle bulge: for the diagnosis of retroperitoneal abscess, physical examination reveals a perinephric abscess, spinal rib angle bulge with tenderness, lumbar muscle spasm, and depressed edema of the lumbar skin. Retroperitoneal abscess, is a confined purulent infection that occurs in the retroperitoneal space. It often occurs secondary to infection of intra-abdominal organs, retroperitoneal organs, spine or twelfth rib, pelvic retroperitoneal cavity abscess, and bacteraemia. The abscess may invade upward into the mediastinum, downward into the thigh along the femoral hernia, or it may penetrate into the abdominal cavity, gastrointestinal tract, pleura, bronchus, or even form a chronic persistent fistula.