Feverish conditions are often associated with agues, which is a term used to describe a feverish illness that is accompanied by shivering and sweating. Agues can be caused by a variety of illnesses, including malaria, typhoid fever, and influenza. Symptoms of agues include chills, fever, headache, fatigue, and muscle aches. Treatment for agues typically involves rest, fluids, and medications to reduce fever and pain.