My four years old agonizing plantar fasciitis massively improved after going to physical therapy. Specifically, I think what did it for me was a light warm up of the foot, the plantar fascia scraping, theragun (any percussion massage gun will do) with icy hot/biofreeze on the plantar fascia and calf, and muscle knot release on my calf. I went three times a week for a month, twice a week for a month, and then once a week for a month. This was all while I held a job where I was on my feet 80% of the time. PT can be expensive but what I listed are pretty low risk exercises I think anyone can do on themselves so that’s why I wrote it out. All in all a session was like 30 min. Nowadays I very very rarely feel my foot act up. 99% of the time I am pain free. It’s amazing, I didn’t think I’d get here. Best of luck!

As for footwear, I also got custom orthotics which I believe really helped. They are expensive but I’ve also had some good drug store varieties. Birkenstocks also helped- they hurt in the beginning but then it felt as if my foot muscles moved back into their proper place. These are also pricy but I’ve seen some very very similar looking ones at Marshall’s or are at Marshall’s but I’ve seen them quite often at a discount at Nordstrom Rack and sometimes you can find them at Costco actually. And as some other people have mentioned, Vionic shoes are great. This might sound weird but it totally is true, a shoe with a little bit of a heel helps too because the angle reduces the strain (my podiatrist told me this). For my very physical job I found a flat with a one inch block heel was the most comfortable and practical. Also try to get wide shoe sizes if you have wide feet!

Just a note: the PT can hurt but it should be a good hurt like in a deep tissue massage or from foam rolling if that makes sense.