It means that there is some kind of inflammation, usually an infection.
You should call your doctor immediately.
Pyoureter is the medical term meaning pus in the ureter.
Apyogenous
An abscess is a walled-off pocket of pus.
Pyuria is the medical definition for pus in the urine per the medical dictionary. This is called pyuria.
Pustul/o- is the combining term for pimple.
Gangrene is the medical term meaning that an ischemic area has developed a secondary pus-producing infection.
Empyema
Suppuration is the noun meaning the formation or discharge of pus. The related adjectives are suppurative or pyogenic, meaning related to the formation of pus.Suppuration
Pyonephrolithiasis = The Presence of pus and calculi in the kidney
pyoderma
abscess
Abscess.