"To all our Black Label Family Worldwide, thanks for all the Get Wells. Every 48 hours in the ER to check my blood, had a CT scan today and have blood clots in each of my lungs as well as my leg. Can't sing because pushing can cause an embollism."

Just how serious can blood clots be? According to yourtotalhealth : Although most blood clots tend to dissolve on their own with no long-term problems, there are situations in which blood clots can cause medical problems.

Blood clots become dangerous when they block blood flow through an artery or vein. When a blood clot blocks blood flow to an artery in the heart or brain, a heart attack or stroke may result. Blood clots can also block veins and arteries throughout the body, causing diseases that range from varicose veins to a life-threatening pulmonary embolism.

In related news, the Black Label Society were set to take part in 101 WRIF's 1st Annual "Bad Ass" Concert but have pulled out due to Zakk Wylde's health problems see story.