Fever is a rise in body temperature above normal. In the early stages there is accompanying headache, sickness, thirst, diarrhoea or constipation, and possibly back pain. This is usually followed by an increase in pulse and breathing, hot dry skin, a marked thirst and loss of appetite, and reduced urination. It is primarily caused by a viral or bacterial infection, and may occur with any infection, however minor.

It is recommended to consult the doctor if fever persists.