Since the advent of penicillin in the 1940s, a major preoccupation in the treatment of streptococcal<unk>  has been the prevention of rheumatic fever, and its major effects on the nervous system and heart. Complications may rarely include dehydration and kidney failure due to difficulty swallowing, blocked airways due to inflammation, and pharyngitis due to the spread of infection. An abscess may develop lateral to the tonsil during an infection, typically several days after the onset of<unk> . This is termed a peritonsillar abscess (or quinsy). Rarely, the infection may spread beyond the tonsil resulting in inflammation and infection of the internal jugular vein giving rise to a spreading infectious thrombophlebitis (Lemierre's syndrome). In strep throat, diseases like post-streptococcal glomerulonephritis can occur. These complications are extremely rare in developed nations but remain a significant problem in poorer nations.
Tonsillitis
Laryngitis
Croup
Sinusitis
Epiglottitis
Adenoiditis
Esophagitis
Pharyngitis