My fiance and his father share a similar issue. I don't know what's going on, and I'd like to know.
Once a month, he'll randomly be hit with some sort of illness. It causes him to pass blood (no stool, just blood), vomit intensely, and have a fever for three days. He can't get out of bed, and he turns my apartment into a sauna in an effort to cool down!
I'd just like to know what this could be from. He's in perfect health otherwise, and it's been happening for years. I don't know what it could be.