what is causing my left leg,arm,and left side of my face to swell
The different types of infections that may cause one sided swelling of the face includes 1  : Cellulitis. 2  If this extends to the area around the eye then it is known as orbital cellulitis. 3  Abscess â tooth, gingival (gum), peritonsillar. 4  Sinusitis which is an infection of the paranasal sinuses.
Apart from the tissue, each side of its face has its own blood, nerve and lymphatic supply. Therefore a condition that affects these structures on one side will lead to swelling only on that side. If the condition is systemic, or generalized, then both sides may be swollen simultaneously.