Ear Bleeding Possible Causes | Cleveland Clinic

Ruptured eardrum: The eardrum is a membrane that protects the middle ear from bacteria. When this membrane tears, it can bleed. Loud noises, severe ear infections and trauma can all cause a perforated or ruptured eardrum. Eardrums can also rupture from a sudden change in air pressure (barotrauma) when flying on an airplane or scuba diving.

https://my.clevelandclinic.org/health/symptoms/21084-ear-bleeding/possible-causes