"I've had a lot of panic attacks off the golf course," Watson told reporters. "I actually went to the hospital three times thinking I was having something wrong with my heart and my wife is like, 'What is wrong with you?'"
Each time, Watson said doctors didn't find anything wrong.
"I've done everything," he said. "I've done EKGs, we've done tests, all kind of things. [The doctor] told me, basically, I need medicine. I need medicine that calms me down."
Watson said that his last panic attack was in Los Angeles at the 2011 Northern Trust Open, when he withdrew after a first-round 76.