Bed rest and physical rest (even if fever is only mild; if limb pain and lassitude occur without fever, bed rest and physical rest is also required, because myocarditis/heartmuscle inflammation could occur as a result of the infection).
Fever below 38.5 °C does not necessarily need to be treated!(Exceptions: Children prone to febrile convulsions; elderly, debilitated people; patients with a weakened immune system).
In case of fever from 39 ° C calf compresses can help to reduce the temperature, which often leads to an improvement in the condition.
After the fever still a fever-free day of rest, if necessary longer (mainly bed rest and stay indoors).