I got it the last year I worked..(partly the reason I took early retirement)..caused mainly by standing up to 10 hours a day, despite wearing low heels...... It was horrifically painful particularly in the morning when I got out of bed, couldn't put my foot down flat without screeching.
I didn't have any physio, basically because there was no time available to me outside of work to have it, so instead I watched every Youtube video I could..
I didn't use a Boot.. but I did buy shoe inserts, they didn't work at all, very uncomfortable .. I kept my feet elevated on a cushion when I was at home.. but the relief came with compression socks , and Sketcher GoGa Mat ( memory foam insoles)...trainers .. ( they have to have memory insoles )
Compression socks
https://www.amazon.co.uk/Plantar-Fasciitis-Socks-Support-Women/dp/B01LZT011W
I'd always worn fashion trainers.. but after finding sketchers they were a life saver for me
I can't say that it cured the PF overnight, but OMG, the relief from the pain almost from day one was palpable , after suffering agony for many months ..
Finally I could stand on my feet for more than an hour at work without crippling pain.. and get through to the end of the day without wanting to tear my legs off
I had to wear the compression sock ( which btw feel very tight when you put them on , they have to, to be able to work)... for about 2 months along with the skechers, then I was able to discard the socks, and just wear the skechers.
3 years on, I still wear the Skechers ( i have several pairs) .. 75% of the time, and now I'm able to wear normal fashion trainers or boots on occasions for short periods , without any pain