Hi, thanks for using healthcare magic
You seem to have rhinosinusitis which is inflammation of the sinuses
and nasal passages.
It can be due to exposure to specific allergens or to infections.
If you have no history of allergies then it may be simply related to infection though some persons may have both at the same time.
Treatment with antihistamines and a topical steroid nasal spray
is correct. You can add a decongestant to this which would relieve the pressure sensation and the congestion.
If you are allergic to anything that you know of , then avoidance would be helpful.
I hope this helps