Now I am just musing here if anyone else has this issue. After I get a through face fucking by an endowed guy. I always have a bit of sinus issues for a couple days later. Anyone else experience this? Is it me deep throating? Is it the cock banging against my throat causing irritation.
Do I need to stop sucking cock all together?
I've experienced a little nasal discomfort during and for a short time after some BJs. What we need here is the input of an ENT specialist, which I'm not. But here's what I've personally encountered, and some speculation:
When I blow a guy who's lying on his back, my head down, I sometimes get the sniffles. This may be because I've got a foreign object half-way down my throat, combined with my head position, which at times may be partly upside down. Of if he's literally face-fucking you, is your head back, even hanging upside down over the bed edge?
Would that flood of nasal mucus help to circulate the rhinovirus throughout the nasal passages, and to enter into some of the sinus cavities because of the head-down position? The rhinovirus is often present in many people, flaring up when conditions are right. It's one reason I like saunas & steam rooms, since breathing hot air above 104 F is thought by some to keep it in check.
Aside from picking up some infectious pathogen from the dick itself, or from pre-cum/cum, that's the best answer I can come up with, and it's just an untrained guess. Next time try blowing with your head in a normal level position, with him standing, sitting or kneeling, or face-fucking with you sitting upright, and see if it makes a difference.