Doctors at Hannover Medical School in Germany recently revealed that they treated a heavy metal fan's blood clot in January, which was due to headbanging.

The 50-year-old Motorhead fan complained of constant headaches, but had no history of head injuries or drug use, the doctors noted in the medical journal The Lancet.

However, he had been headbanging for years and had gone to a Motorhead concert four weeks earlier.

After running tests, the doctors found the metal fan had a blood clot and subsequently drilled a hole into his head to drain some blood for six days, notes The Independent.

The man's headaches quickly vanished, but doctors later found he had a benign cyst that made him more likely to suffer a brain injury.

“We are not against headbanging,” Dr. Ariyan Islamian told the Associated Press. “The risk of injury is very, very low. But I think if [our patient] had [gone] to a classical concert, this would not have happened.”

Dr. Islamian said that headbanging can possibly cause the brain to bump up against the skull, but that is rare.

“There are probably other higher risk events going on at rock concerts than headbanging,” stated Dr. Colin Shieff, a neurosurgeon. “Most people who go to music festivals and jump up and down while shaking their heads don’t end up in the hands of a neurosurgeon.”

Sources: The Independent and Associated Press