I feel for you, I suffer from the exact same. In the evening it's worse than during the day, but overall it impacts my daily life big time. I'm seeing an ENT later this month. Had one visit already, but the guy didn't care and told me not to focus on it too much... Impossible haha. And the weird thing, only my left side seems to be involved, like it's coming from my left nostril only. My GP noticed that my left upper turbinate is very swollen, right is fine. So weird. Tried several nasal sprays such as Dymista and Avamys but non of them worked, they only gave me dry nose and bloody nose. Allergies are ruled out via blood test, but I'm gonna ask for a skin prick test as well just to be 100% sure (don't think it's allergies because I'm suffering 13 months already and right nostril is fine). Other weird thing is the PND started thin and watery and after a few months changed to thick and sticky. Which is actually less uncomfortable, but ok. I'm also a member of a FB group about rhinitis and PND, and there are treatments such as Rhinaer and Clarifix where they freeze a nerve to stop the PND. But lots of reviews from people that didn't benefit from that. My last resort is going to be posterior nasal nerve neurectomy where they basically disable the nasal nerve that's responsible for mucus production. But since I'm in the Netherlands and that procedure is only done in US and Thailand if I'm not mistaken, I don't know if it's really an option. Long story, sorry, but you're not suffering alone and I'll update if my ENT visit is succesfull later this month.