PERITONSILLAR ABSCESS(QUINSY) Collection of pus between the fibrous capsule of the tonsil, and the superior constrictor muscle of the pharynx. Condition is generally unilateral. Tonsil is swollen, red, hot & congested. Uvula and soft palate are pushed to opposite side. Uvula Points towards Normal side as shown in the image. Organism involved are Streptococcus, Staph aureus, anaerobic organism, more often mixed growth is seen. Parapharyngeal abscess (abscess of lateral pharyngeal space, pterygomaxillary, space, pharyngomaxillary space: Swelling is on lateral wall of Pharynx pushing tonsils towards midline. Patient may also have a swelling in neck, posterior to SCM muscle. Patient may also present with Trismus. Ludwig's angina is cellulitis of submandibular space.