Jackass star Bam Margera has axed his upcoming U.S. tour after suffering health issues relating to a hernia.

The TV prankster had to cancel a show in Finland recently due to an unspecified injury and now he has called off a series of American dates as well.

A message posted on Margera's Facebook.com page reveals he has been suffering from a hernia, and he aggravated the condition by going "waterfall jumping" during a break from his European tour in Iceland.

The note reads, "A thousand apologies to everyone affected by the USA tour cancellation, we are truly gutted about it. A few months ago Bam got injured while kayaking off a 100 foot waterfall in Oregon and more recently (proving we are experts in the bad decision dept.) we went waterfall jumping during a day off in iceland (sic) and of course Bam re-damaged the same hernia he got in Oregon.

"If anyone has ever had a hernia before you would know that it hurts like f**k to sing. I also realize how ridiculous and over the top these injuries are, but I mean jesus christ (sic) - it's Bam we are talking about here."