The bleed may be due to elevated blood pressure.
For workup he should have Blood CP and PT ( Prothrombin time
) and INR with serum levels of calcium.
Nose bleed may be due to some bleeding disorders.
If PT and INR is abnormal then proper workup should be done for the cause of abnormality.
I hope I am succesful in solving your query If you have more you can ask me.
Dr. Azhar Sattar