Blisters or Pustules
More severe cases of cellulitis may cause blisters containing pus [7], also called pustules, to form on the red, swollen parts of the skin. Pustules are inflamed parts of the skin that are usually very soft. These parts of the skin may break down and ooze pus from the resulting sore.
Fever
The bacteria that cause cellulitis are foreign pathogens that the body considers harmful. You may experience a rise in body temperature that is above normal while your body tries to fight these harmful foreign bodies. This rise in temperature, called a fever, is caused by the immune system’s reaction to this bacteria.
Some people develop chills along with fever when they have cellulitis. The Center for Disease Control and Prevention (CDC) [8] recommends seeing a doctor immediately if you develop a fever or chills.