Nasal sprays and the like probably work because one cause is the inflamation of sinuses. Another reason is the anti-histamines. I only just found-out that histamines are alcohols and present in dark drinks as congeners &/or associated with them. My doctor prescribed anti-histamines and I didn't take them because despite my questioning he reckoned there would be no contra-indications. Till I got the box, plastered with warnings about driving &/or drinking and taking the tablets. Maybe one before bed might do the trick. Asprins can but asprin and alcohol are not a good conbination - not that I noticed. Certainly drinking to replace fluids during the night instead of flooding my stomachhe feels better.

As for migraines without apparent cause - don't get em since the responsible job went out the window.

Though I am careful if I have a sniffle to were a wooly hat during sleep. Lets face it the rest of the body is lagged but not the head and in the winter if the capilliaries get cold they shut down in most of the body which in the head starve the brain of oxygen and thus gives you a headache. It "helps" rather than cures - staves off the "almost".