Claim: Naproxen is a swelling reliever.

Inflammation -LRB- from Latin en : inflammatio #Latin -RRB- is part of the complex biological response of body tissues to harmful stimuli , such as pathogens , damaged cells , or irritants , and is a protective response involving immune cells , blood vessels , and molecular mediators . The function of inflammation is to eliminate the initial cause of cell injury , clear out necrotic cells and tissues damaged from the original insult and the inflammatory process , and to initiate tissue repair .   The classical signs of inflammation are heat , pain , redness , swelling , and loss of function . Inflammation is a generic response , and therefore it is considered as a mechanism of innate immunity , as compared to adaptive immunity , which is specific for each pathogen . Too little inflammation could lead to progressive tissue destruction by the harmful stimulus -LRB- e.g. bacteria -RRB- and compromise the survival of the organism . In contrast , chronic inflammation may lead to a host of diseases , such as hay fever , periodontitis , atherosclerosis , rheumatoid arthritis , and even cancer -LRB- e.g. , gallbladder carcinoma -RRB- . Inflammation is therefore normally closely regulated by the body .   Inflammation can be classified as either acute or chronic . Acute inflammation is the initial response of the body to harmful stimuli and is achieved by the increased movement of plasma and leukocytes -LRB- especially granulocytes -RRB- from the blood into the injured tissues . A series of biochemical events propagates and matures the inflammatory response , involving the local vascular system , the immune system , and various cells within the injured tissue . Prolonged inflammation , known as chronic inflammation , leads to a progressive shift in the type of cells present at the site of inflammation , such as mononuclear cells , and is characterized by simultaneous destruction and healing of the tissue from the inflammatory process .   Inflammation is not a synonym for infection . Infection describes the interaction between the action of microbial invasion and the reaction of the body 's inflammatory response -- the two components are considered together when discussing an infection , and the word is used to imply a microbial invasive cause for the observed inflammatory reaction . Inflammation on the other hand describes purely the body 's immunovascular response , whatever the cause may be . But because of how often the two are correlated , words ending in the suffix - itis -LRB- which refers to inflammation -RRB- are sometimes informally described as referring to infection . For example , the word urethritis strictly means only `` urethral inflammation '' , but clinical health care providers usually discuss urethritis as a urethral infection because urethral microbial invasion is the most common cause of urethritis .   It is useful to differentiate inflammation and infection as there are many pathological situations where inflammation is not driven by microbial invasion -- for example , atherosclerosis , type III hypersensitivity , trauma , ischaemia . There are also pathological situations where microbial invasion does not result in classic inflammatory response -- for example , parasitosis , eosinophilia .