How can cellulitis spread?

Bloodstream. Bacteria can spread through the blood throughout the body potentially in rare cases becoming a serious whole body infection.
Cellulitis reinfects. Cellulitis can spread to immune compromised people suffering from diabetes or HIV if an infected person does not take the right precautions. The wound must be covered with sterile dressings and an over the top covering so that the bacteria does not contaminate others. Also, they should be taking antibiotics to stop the microbes from growing.