Complications range from physical discomfort through to an increased risk of developing life-threatening secondary infections. In most healthy individuals it resolves without medical treatment, but it can be a serious problem in individuals with weakened immunity, the elderly, small children and the chronically ill. Influenza typically begins with a headache, followed by a fairly high temperature. The patient becomes listless and tired, may complain of aching limbs. As the fever develops, the patient may feel cold.
Generalised weakness can be evident with a loss of appetite.
Initially the patient may suffer from a sore throat and develop an unproductive cough. After a few days the cough may further develop and become more severe, to the point where coughing causes pain in the chest during coughing bouts. Other symptoms can include red and watery eyes. Influenza may cause vomiting, especially in children. Always consult your Doctor for diagnosis and advice.