What characteristic symptom differentiates peritonsillar abscess from simple tonsillitis?

The characteristic symptom that differentiates a peritonsillar abscess from simple tonsillitis is the deviation of the uvula. In cases of a peritonsillar abscess, the swelling and pus associated with the abscess can push the uvula away from the affected side, creating noticeable asymmetry. This is a clinical indicator that suggests the presence of an abscess rather than uncomplicated tonsillitis, where the uvula typically remains midline and does not show signs of displacement.

Uvula deviation is an important physical exam finding in the context of throat pathology. It indicates significant inflammation and involvement of the surrounding tissues, which is more pronounced in a peritonsillar abscess compared to simple tonsillitis. Recognizing this sign is crucial as it helps in identifying the potential for more severe complications and allows for timely intervention.

Other symptoms such as cough, low-grade fever, and swelling of the neck might present in both conditions but do not provide the same level of diagnostic clarity or specificity regarding the presence of an abscess.