A condition in which tissue reacts to injury and undergoes changes during the healing process. As an example, a toe with a sliver of wood in it would be inflamed and show the signs of inflammation which include redness, increased temperature, pain, swelling and a loss of or disordered function. The toe is swollen, red, hot, painful, and the animal is reluctant to walk on that toe. Swelling, redness, heat and pain of a body part. Redness, swelling, heat and pain of a body part.