...hey, if it works it works! more typical for nsaids to help with shadows. you may have nailed it with the allergies connection. anything that causes inflammation, histamine release, vitamin D3 depletion, hormone releases can be triggers for us. my first few yrs antihistamines were helpful....many find help with Benadryl prior to sleep or even daily during certain cycle parts (will make you sleepy). note that while the nasal congestion could be an allergy symptom.....it is also absolutely typical of cluster autonomic symptoms. i used Tiger Balm inhaling to clear sinuses....didn't affect the hit but cleared the awful congestion that makes a hit even more miserable...