Play video content EXCLUSIVE

If you bang your head to rock music so hard that your skull fills with blood and doctors have to DRILL HOLES in it to save your life -- Rage Against The Machine's Tim Commerford not only has your back ... he says keep rocking!

We asked the Rage bassist about a German Motorhead fan who suffered a brain bleed -- which his doctors partially blamed on years of excessive headbanging -- and Tim doesn't think the horrific news will scare true headbanging fans.

In fact, he says he's felt the same pain, telling us ... "Banger neck, yeah. Every time we played I got banger neck."

Of course, Tim never had to have HOLES DRILLED IN HIS HEAD ... like the Motorhead fan -- but watch him explain why that danger is just part of the show.