A fever or febrile or feverish state of body is the rise of body temperature above the normal, i.e.above the oral temperature of 98.4°F. Fever is generally associated with a hot, dry skin, shivering of body with chill (in the beginning). There is headache, loss of appetite, nausea, vomiting, constipation, diarrhoea, pains in muscles and joints of the body.