Thank you for your question,
There are many causes of hiccups and nose bleeding.
see this web address for details
in your case it seems that most likely cause of hiccups is renal disease.
nose bleeding can be due to local causes of the nose like infections, nasal polyps
others include aplastic anemia, coagulation defects, vitamin C deficiency,coumadin
can also cause nasal bleeding.
as you are taking coumadin so this seems most likely cause in your case.
you may need to stop coumadin to help stop the bleeding but this cannot be done
without your doctors opinion as he will do tests to see whether blood is thin due to
coumadin or any other cause.
I hope this answers your question.