I am unable to understand if the nose bleeds and the sinus problems happen together or are unrelated to each other.
If they happen together, then it may be due to rhinosinusitis that you develop once you get exposed to string chemicals.
If you get any rashes on contact to chemicals, then a type IV hypersensitivity
is likely that can be proven NOT on blood tests but patch tests. If you dont get rashes, then you have (possibly) a hyperresponsive airway that can be better understood using a pulmonary function test using methacholine
challenge. This allows us to understand whether you have a degree of asthma
need to be viewed using a CT scan
to ensure there are no other problems.