inflammation

noun

1. (archaic, countable, uncountable)The act of inflaming, kindling, or setting on fire.
2. (countable, uncountable)The state of being inflamed.
3. (countable, uncountable)A condition of any part of the body, consisting of congestion of the blood vessels, with obstruction of the blood current, and growth of morbid tissue. It is manifested outwardly by redness and swelling, attended with heat and pain.

   “Juvenile rheumatoid arthritis (JRA), often referred to by doctors today as juvenile idiopathic arthritis (JIA), is a type of arthritis that causes joint inflammation and stiffness for more than six weeks in a child aged 16 or younger. It affects approximately 50,000 children in the United States. Inflammation causes redness, swelling, warmth, and soreness in the joints, although many children with JRA do not complain of joint pain.”

4. (archaic, countable, uncountable)Violent excitement.

   “an inflammation of the mind, of the body politic, or of parties”