Fever may be defined as an increase in body temperature to above normal. The term has a very wide application, as fever is one of the most common accompaniments of diseases in general, and infections in particular. In many cases fever must be regarded as secondary to and symptomatic of a diseased state with which it is associated.

The average temperature of the healthy body ranges between 36.9 and 37.5 C or 98.4 and 99.5 F and is liable to slight variations from such causes as the intake of food, the amount of exercise undertaken, and the temperature of surrounding atmosphere. The body experience lowest temperature between 1:30 am and 7 am and the highest between 4 pm and 9 pm.

If the fever rises to 41.1 C or 106 f, the term hyperpyrexia is applied. Hyper pyrexia is a signal of danger for the patient. If the fever exceeds 41.7 C or 42.2 C for any length of time, death almost always ensues. Occasionally, temperature may rise as high as 43.3 C to 44.5 C prior to death. The onset of the fever may be associated with shivering, pain in the back, headache and thirst. These symptoms vary according to the type of fever.

Fever is generally translated as jawar, the connotation of the term jawar in ayurveda is slightly different. It includes not only the rise in body temperature, but also the troubles that afflict mind, the 5 special sense organ, and the body.

Fever is associated with different types of diseases for example: Influenza, pneumonia, and tuberculosis. So, one must consult to the doctor in order to get rid of this.