Fever is a common medical condition in which the body temperature rises above the normal level, usually as a response to an infection. It often occurs when the immune system fights against viruses, bacteria, or other harmful microorganisms. Fever can be caused by conditions such as viral infections, bacterial infections, seasonal flu, or inflammation in the body. Common symptoms include increased body temperature, chills, sweating, headache, weakness, body aches, and loss of appetite.

Although fever is usually a natural defense mechanism of the body, high or persistent fever may cause discomfort and weakness. Proper rest, adequate hydration, and timely medication can help in reducing the temperature and supporting recovery. Monitoring body temperature and seeking medical attention when fever lasts for several days or becomes severe is important to prevent complications and maintain overall health.