Today is pretty crappy

[gja1000]

Unexplained blood loss is very difficult. Yes, it can be that blood cells are being destroyed or are not developing properly - but this usually is ultimately explained by a blood cancer and this is clearly not the case in Janet's mother and probably not in your grandpa either. There can be "pooling" of blood in the spleen, and I can't remember what causes that - which can decrease the amount of circulating blood. As strange as it sounds, sometimes they just can't determine where the blood is going and where it is coming from???

Wish I had a better answer.