After experiencing what was originally thought to be flu-like symptoms Sunday, Michaels was taken to a San Antonio hospital only minutes before he was to perform that evening. Doctors removed Michaels’ appendix early Monday morning.

According to a post on Michaels’ official Web site, doctors are monitoring his condition, complicated in part because he’s diabetic.

From BretMichaels.com:

“Bret remains under medical supervision at an undisclosed private care facility specializing in the rehabilitation of diabetic patients. While the surgery went well and doctors are optimistic that the rocker will make a full recovery, the fact that he was exhausted due to his rigorous schedule prior to the surgery and coupled with the fact that he has diabetes, the surgery has taken its toll. Even for non-diabetic patients the recovery from surgery can be long and painful. Doctors were amazed at how good of health Bret was in being a 47 year-old diabetic. However the main focus and concern right now is that he is able to rest, recover and maintain good blood sugar levels while doing so.”

As to Michael’s revised tour plans, at this moment all dates up through and including April 24 in Florence, Ind., are postponed. For more information, click here for Bret Michaels’ official Web site.