Peritonsillar abscessis defined as the accumulation of purulent secretion in a potential area containing loose connective tissue between the palatine tonsil fibrous capsule and the pharyngeal superior constrictor muscle. It is usually encountered as a complication of streptococcal tonsillitis and pharyngitis. Peritonsillar abscesses have the most common deep neck infection in young adults. In peritonsillar abscess, early diagnosis and prompt initiation of treatment are critical to avoid potential complications. The treatment of peritonsillar abscesses includes abscess drainage, antibiotic treatment, hydration, and supportive treatment for pain control.