Have you been drinking more water than usual? I find I drink more water when I’m fasting.
I’m usually chronically dehydrated. Whenever I start drinking more water (whether fasting or not, but I always drink more water when fasting) I start getting a ton of mucus 😖 Usually post nasal drip and it’s really thick and I have to choke it up or chug water to swallow it down. It’s awful.
I suspect I’m usually so dehydrated that I’m not making much mucus, which is really bad. Then it seems like when I start drinking more the production increases, but there’s still not enough water so it’s thicker than it should be.
The only way it goes away is when I’m finally drinking enough water, which is a TON for me! I assume a combo of my weight and especially the dry climate I live in. (Alberta is ridiculously dry in the winter)
So that’s my experience and my guess as to why it happens. If this sounds like you, maybe try drinking more water than you are currently 🤷🏻♀️ But also consider allergies or something like that. Or has anything else changed since starting IF?
There may also be an actual reason related to fasting, but I wouldn’t know. I just wanted to give a possible explanation based on my experience.