What's a Peritonsillar Abscess? A peritonsillar abscess is an area of pus-filled tissue at the back of the mouth, next to one of the tonsils. The abscess can be very painful and make it hard to open ...

Strep throat is a bacterial infection causing a painful sore throat that worsens when yawning. Postnasal drip occurs when mucus drips into the throat, often worsening throat pain while yawning.