Hi there ~
are common in people that have chronic sinusitis
and their nostrils are blocked for any reason. I think that relieving your nose block should be a good way to deal with your headaches that are related to the sinusitis. Also using effective antibiotics to clear out the rhinitis
is a way to deal with your headaches too. Please consult an ENT specialist
to take care of the problems if the above are not helping.
Take care and have a lovely day !