"It's become unbearable,'' he explained at his Worcestershire home. "I've been at my wits' end trying to understand it. If I take no medication, then the day before a tournament I feel as if I have a hangover. I feel hot, I'm sweating, I feel like my eyes are bulging and I'm overwhelmingly lethargic. I have no control over my cue at all. I can't play. I don't mean I'm not playing well. I mean I can't play.