most helpful answer without the ability to look inside your ears i can only guess but the most likely cause of your ear bleeding was a spontaneous rupture of your eardrum. this can happen from colds or middle ear infections. this is not an emergency but it would be good for you to see your medical provider next week so you can be properly examined. if you are having ear pain or fever then seeing a medical provider sooner would be appropriate.
possible ear infection should i see a doctor? if so whom should i see? . thursday when i was checking out at a store i visited the clerk let me know that my right ear was bleeding. when i got in car and checked in mirror i saw a line of dry blood from ear on face &checked in ear and was still bleeding but stopped appx 5 minutes later. saturday got up to use bathroom and when i got in bed i saw 5-6 spots of blood on pillow possibly from same ear checked &had blood drainage again but nothing in the morning. have had a bad cough for about 2 weeks.