Hemophilia is a (usually) genetic disease that affetcs the blood. In a hemophilic person, the blood is unable to clot properly or as quickly as it would in an unaffected person. If blood does not clot properly or at all (depending on the case, some are more severe than others), then a person could easily bleed to death from a minor wound if they do not have medical attention within a reasonable amount of time. Also, hemophilia can can bruising to occur easily. There can be easy internal bleeding or hemoraging, which can be potentially fatal.
He has a serious mental disorder.
Borderline personality disorder
Healthiness is pretty serious.
Yes, yes it is.
Yes if they have a serious medical disorder.
Yes and it is a very serious disorder. I suggest looking it up along with symptons at www.wikipedia.org
He dislikes you and/or or he has a serious mental disorder.
Yes; a very serious one.
They are a type of white blood cells, not a disease!
Bipolar disorder is a serious disorder that should be treated immediately after it has been found. There are medical treatments depending on how extensive the disorder has become.
Not in and of itself, but not wanting to eat can often be a sign of an eating disorder or a much more serious health problem.
Bipolar disorder, also called manic-depressive disorder, is a mood disorder that leads to significant changes in mood, activity, and energy levels. The shifts between depression and mania can be severe and pose serious risks.