There are two causes of fever after the use of anti-inflammatory drugs. The first reason is that the fever may be caused by allergies. If the fever is caused by allergies and is accompanied by a series of other symptoms, such as difficulty breathing, it is necessary to treat the symptoms with desensitizing medications. The second reason for using anti-inflammatory drugs may be due to infection. If the anti-inflammatory drugs are anti-inflammatory and not effective enough to control the infection, in this case, the same fever in the body may also occur. It is recommended to change the antibiotics so that the infection can be controlled and the symptoms of body fever will be controlled.