Flu symptoms include coughing, AGUE, FEVER, CHILLS, PALLOR, ACHE, and CHILL. Coughing is a common symptom of the flu, which is caused by a virus and can be spread through contact with an infected person. AGUE is a feeling of shivering or trembling, which is often accompanied by FEVER. FEVER is a rise in body temperature, usually caused by infection. CHILLS are an uncomfortable sensation of coldness, often accompanied by shivering. PALLOR is a pale complexion, which can be a sign of illness. ACHE is a dull, continuous pain, which can be caused by the flu. CHILL is a feeling of coldness, which can be a symptom of the flu. SHIVER is an involuntary trembling of the body, which can be caused by the flu.