To @danny95
I cured my acute constant sinusitis accompanied by severe cough 3-8months every year for at least 20 years . I was convinced it was sugar too. I found out in 2017 I had a root canal ( next to a lot canal that was being done) that was infected. The root canal specialist said it had 1root cleared and 2 left undone and it was infected. This was originally done about 20 yes earlier. Went back to my dentist who said it is no problem, infections stay in that area and doesn't travel. As long as no pain, no problem. I believed him. In 2019 the crown fell off. So I thought I should get root canal completed before putting on another crown. My dentist said you can if you want. Went to another root canal Dr who said, yes it is still infected, but you should probably pull it because it may not clear by finishing it. Covid happened and delayed pulling it. In the mean time ( I also had migraines) pain was getting worse. Traveled into neck and back. Not pain in that tooth. Reminder, it's an upper back tooth, next to sinuses. Migraines 22 days in a row. Couldn't wait to get tooth out. Somehow I knew migraine was from tooth.
The day it was pulled, I left the office, my distance vision was immediately clear. I had worn glasses for over 10 yrs to drive. Also, no pain in head, back or neck for 4 days. Pain returned but vision remained clear. My sinuses were clear. No more sinusitis, no more drainage. I have not had my horrid cough in 15 months. Miracle. Migraines are almost gone. Dentists still say sinusitis and cough were not from the tooth. Doctors say infection from tooth does not travel like that. All my CT scans from ENTs over the years never noticed the infection butted up against sinuses. Why?
If you have root canal, you might have it checked. Regular dentist won't see it. I understand only root canal specialist does 3D scan to see infection . You can have tooth infection with no pain. And yes, mine was always triggered when I ate . Sorry, so lengthy . Hopefully, maybe a miracle and you have a hidden tooth infection. That sounds goofy. But worth checking. Good luck .