TREAT FIRST, Diagnose second. Assume bleeding until proven otherwise.
Two types (clinically indistinguishable):<unk>  A: Factor VIII deficiency<unk>  B (Christmas disease): Factor IX deficiency
Substantial proportion (~1/3) of both types arise from spontaneous mutations
Most common X-linked disorder(overwhelmingly a disease of men)
ICH is most common cause of hemorrhagic death
Do not give NSAIDs or IM injections
Avoid invasive procedures (e.g. central lines, LP)<unk>  A: Factor VIII deficiency<unk>  B (Christmas disease): Factor IX deficiency
Rapid transport to definitive care
Apply pressure and achieve hemostasis in active bleeding patients
Bring Factor therapy with patient and encourage use during transport
Determine history of trauma or prior complications with<unk> 
For hemarthrosis; elevate, ice, and protect joint (crutches for knee/ankle)
Hemophilia
Too few
Von Willebrand disease
Thrombocytopenia
Factor V Leiden
Nonfunctional
Hereditary hemorrhagic telangiectasia
Aspirin