Per a press release from the Spanish royal court:
“During February 9 and 15, 2013, His Majesty King Juan Carlos I of Spain has been subjected to annual medical examinations. After completed examinations, the results were satisfactory.
However, there is still persistent aggravation of a former herniated disc in lumbo-sacral spine. At this time the palace and His Majesty’s doctors are studying to determine the most appropriate treatment for His Majesty.”