A peritonsillar abscess is a bacterial infection that usually begins as a complication of untreated strep throat or tonsillitis. A pus-filled pocket forms near one of your tonsils. It can cause pain ...

Tuberculosis (TB) primarily affects the lungs. However, TB-causing bacteria can lead to pus collecting in the tissues. This is known as an abscess. Mycobacterium tuberculosis (M. tuberculosis) is the ...

A cyst is a sac or cavity that may be filled with pus, semi-solid material, or air. It doesn’t usually cause pain until it gets large. An abscess is a painful, red infection that’s filled with pus. A ...