Recurrent myocarditis is very rare, with most cases reported in adults. We present a case of a 16-year-old boy with 2 episodes of myocarditis 4 months apart. The aetiological factor of the first episode was not detected, whereas the second episode was caused by HHV-7 infection, which, according to literature reports, is an extremely rare cause of myocarditis. We described the evolution of changes in electrocardiography, changes in echocardiography and magnetic resonance as well as laboratory abnormalities, with particular focus on the differences between the first and the second episode. The patient was treated with bed rest and enalapril. Metoprolol was included during the second episode. The left ventricular function returned to normal after both episodes. This rare course of disease indicates the need for further clinical follow-up and periodic cardiac check-up in children considered to be cured.