I just had this experience a couple of days ago; I was going down (too fast to notice I am told) when without prior sign or ache the eardrum of my right ear popped and burst. I stopped the dive and returned to the surface just to verify that blood was coming out my eardrum. As I am still a beginner in freediving and actually in schock that this has happened to me; I am still struggling to find out what went wrong and how could i have prevented it. I ve experienced many times when i cant equalise any more and i stop... but this happened with no warning sign to me...is there anything specific i should have checked after my eardrum (hopefully) heals in a couple of months? Thanks.