He says won't be down for long, "The doctors are telling me that each day I've been here in hospital my platelet count has been going up and I should be healthy to play in a few weeks."

Here is his full statement.

"I am writing this to thank everyone who called, or e-mailed me the past few days. Believe me, they have been some of the scariest days of my life.

"This is the short version of what happened: I started getting these wierd bruises all over my body about two weeks ago. I was getting very weak after the shows so I saw a doctor in London on Friday. He took some blood tests and when the results came in they rushed me to the hospital.

"It turned out I have ITP [Idiopathic Thrombocytopenic Purpura]. It's too hard to spell, but basically it's a blood infection where because of an allergic reaction, my blood platelets - the stuff my bone marrow produces to help my blood clot - were really low. I mean, way low. Most humans have between 140 and 400 in their cells. I had 5... no joke... FIVE. If I continued to headbang on stage I could have had a brain hemorrhage and dropped dead on the spot.

"My doctors ordered me to remain at the hospital until they could get my blood in some healthy shape.

"I want to thank the doctors, nurses and staff at The London Clinic, all the singers who performed with the band at the Donington festival: Corey from Slipknot/Stone Sour, Dez from Devildriver, Jesse from 10 Years, Benji from Skindred, Shadows from Avenged Sevenfold, and Matt from TRIVIUM. I want to thank my band and crew for all their love and support, my loving family and friends and most of all the fans, the best fans in the world.