2. Cellulitis (Skin Infection)
Another common cause is cellulitis, a bacterial infection of the skin and underlying tissues. It often starts suddenly, causing the affected leg to look red, swollen, warm, and tender. The skin may appear shiny or tight, and in some cases, blisters or small abscesses may form. Fever, chills, and fatigue can also accompany cellulitis.
This infection usually occurs when bacteria enter the skin through a cut, scratch, insect bite, or ulcer. Without prompt antibiotic treatment, cellulitis can spread quickly and even become life-threatening.
