Had that too :-)
Last year before hiking I wore this sort of walking boot thing that stretches out your calf muscles, the logic being that since the fascia is all connected, by loosening it up you allow things to stretch more without inflaming. Something like this:
https://www.amazon.com/Alphabrace-Plantar-Fasciitis-Splint-Medium/dp/B001PB07S8
I had no PF problems last year, although I did break my foot and get off early because of that.
Thanks, I went to the doctor about 18 months ago and custom inserts were suggested, but it calmed down significantly after I started school (I had been working at a hardware store, 8-10 hours of standing on concrete is no fun). Annoyingly, this semester I'm on my feet a lot more, and my feet are letting me know they're not happy.
Is this the type of splint you mean? Do you sleep with it? ^how?
If it hurts noticeably more when you step on it after being off it and relaxing it for a while (laying or sitting for a long time, especially first thing in the morning) then it's definitely Plantar Fascitis. The good news about that is it's very common and there's not much a doctor can do that you can't do yourself. You can google for all sorts of stretches and exercises. I'm a believer in night splints. There are a number of variants that do the same thing (keeping it stretched at night).
I used this bad boy and got better shoes. It has been gone for years now :) https://www.amazon.com/Alphabrace-Plantar-Fasciitis-Splint-Medium/dp/B001PB07S8