I'm not quite sure what to search for given this is a "fantasy" type of medical symptom, but:
There was a character who was drained of a lot of her life force and it sent her into a coma. Medically, what might this show if she was examined by a doctor?
The drain was tactile based, and not from a vampire bite. The only thing I could think of was compromised immune system, but would that send her into a coma? If there were no foreign bodies introduced, what could it show?
Is there a real medical disease that is similar to this?