In August 2007, Arias was affected by tendinitis, and in April 2008 he canceled some activities because of muscular pain in his lumbar region. Subsequently, due to increasing difficulty in speaking over the course of several weeks, Arias went to the Philadelphia Ears, Nose and Throat Associates medical center in the United States on 20 May 2008, where it was determined that he had a nonmalignant cyst on his vocal cords. As a result, it was announced on 21 May that doctors advised him not to speak for one month, saying that if this did not help, surgery would be considered. On 11 August 2009 Arias was diagnosed with H1N1 Influenza, but he recovered.