Usually, you do not need to visit a doctor if you develop the Flu since it can be treated at home. However, visit a doctor if you fulfil one or more of the following conditions. You suffer from a preexisting health condition. You have a weakened immune system due to the consumption of medication or some disease. If you are below the age of five years or above the age of 65 years. If your temperature doesn’t decrease after four to five days of continuous fever. If the Flu symptoms get worse. If you have difficulty breathing or suffer chest pain.