<unk> - inflammatory reaction between palatine tonsil and pharyngeal muscle with no discrete collection of pus.
Peritonsillar abscess - collection of pus located between palatine tonsil and pharyngeal muscle.
Peritonsillar cellulitis
Streptococcal pharyngitis 
Epiglottitis
Neisseria gonorrhoeae
Retropharyngeal abscess
Diphtheria 
Peritonsillar abscess
Bacterial Tracheitis