The exudate carries proteins, fluid and cells from local blood vessels into the damaged area to mediate local defenses. The damaged tissue can be broken down and partialy liquefied, and the debris removed from the site of damage. The cause of acute inflammation may be due to physical damage, chemical substances, micro-organisms or other agents. The inflammatory response consist of changes in blood flow, increased permeability of blood vessels and escape of cells from the blood into the tissues. The changes are essentially the same whatever the cause and wherever the site.
Acute inflammation is short-lasting, lasting only a few days.
If it is longer lasting however, then it is referred to as chronic inflammation. Various examples of acute inflammation that you may be aware of are sore throat, reactions in the skin to a scratch or a burn or insect bite, and acute appendicitis . Generally, the suffix -itis refers to inflammation of a particular organ. Thus, inflammation of the appendix is appendicitis, of the liver hepatitis and so on. However, there are occasional historical exceptions such as pneumonia, inflammation of the lung rather than pneumonitis and pleurisy , inflammation of the pleura, rather than pleuritis.