Your sister is having ecchymoses on whole body.
And there may be bleeding from orifices of the body.Platelet count
After knowing about the condition, I think your sister is having throbocytopenic purpura
... It may primary i.e. idiopathic throbocytopenic purpua or secondary TP..where theremay be some reason.
To confirm the diagnosis and find out the cause, you consult dermatologist
And then she may be given perfect treatment.
I hope you got my answer... Thanks.
Dr. Ilyas Patel MD