Pathology . redness, swelling, pain, tenderness, heat, and disturbed function of an area of the body, esp. as a reaction of tissues to injurious agents.

the act or fact of inflaming.

the state of being inflamed.

noun

burning , infection , irritation , pain , rash , sore , tenderness , soreness , acne , arthritis , boil , bursitis , chafing , conflagration , congestion , fire , gout , phlegmasia , phlogosis , suppuration , swelling