Motorhead were forced to cancel Saturday's (June 22) concert at Austria's See-Rock Festival and have scrubbed their June 25 show in Milan as well. The reason? According to a Facebook post by the Italian promoter, frontman Lemmy Kilmister suffered a hematoma and was unable to go onstage.

A hematoma is a mass of usually clotted blood caused by a broken blood vessel that forms in a tissue, organ or body space. They can occur anywhere in the body, and the prognosis varies widely. Specific information on the cause, location and severity of Lemmy's hematoma has not been released.

This is not the first health issue the 67-year-old rocker has dealt with recently. Lemmy underwent surgery to be fitted with an implantable cardioverter-defibrillator (ICD) after being diagnosed with an irregular heartbeat. If an ICD detects cardiac arrhythmia, it automatically delivers a jolt of electricity to correct one’s heartbeat.

We wish the legendary Lemmy a speedy recovery, and hope that he's back on stage in the near future. Motorhead's upcoming studio album 'Aftershock' is tentatively set for a September release. Lemmy also collaborated with Huntress on a song that appears on their album 'Starbound Beast,' due to be unleashed on July 2.