I'm so sorry. Usually saying 'bleeder' or 'bleed' is associated with a blood vessel that has ruptured. What the cause of the blood vessel to rupture is is something you are going to have to pry out of the doctor.
My mother had a bleed from an ulcer in her stomach. She passed a lot of blood so where was his bleed from? Stomach or bowel or small intestine and what was the cause? A new tear or a new ulcer?
You both have been through so much and although I haven't 'seen' him I imagine his physical condition is very fragile.
You do know that you can always ask to see his chart and read the reports yourself. Those notes and reports belong to him and if you have disclosure through HIPPA you also.
But back to the original question a 'bleeder' usually means that he is bleeding from a compromised blood vessel or area be it from a vein, capillary or artery.
Prayers are with you both. I know you are exhausted. Please consider making a list of questions for the doctor when you see him. As tired as you are and as stressed as you are don't trust your memory to 'remember' everything.

X2
Morning everyone. Woke up to a roaring thunderstorm this morning at 5 AM. Dogs were howling, thunder was crashing wind was blowing rain was pouring...gee that sounds like a song. Anyway. Told the dogs not in this lifetime were they going out in the middle of this and went back to sleep.
Up to 91 again today. They say the weather will break over the weekend with cooler temps but till then, 90s and storms. Sounds like summer wind down is going out with a bang!