A rash usually does not occur after the flu, but if the flu causes the body to be immunocompromised and is accompanied by other viruses such as chickenpox shingles virus, there is a possibility of a rash after it has healed. Influenza refers to influenza and is caused by the infection of the body with the influenza virus. When the organism is infected with influenza virus, the clinical manifestation of a rash usually does not occur. The main clinical manifestations of influenza virus infection include high fever, headache, malaise, loss of appetite and depression. If you develop a rash after influenza, it is recommended that you consult a doctor in a timely manner to determine whether your body is infected with other viruses that cause the rash, and to treat the cause in a timely manner in order to minimize the damage of the rash to your body.