Arch Pain

My arches become sore if I stand around more than usual or stand around the same time in non-supportive shoes. They heal when I wear my running shoes all the time.

Did you run during the healing period?

Also, as I've been running with the plantar fasciitis, I've developed a pain in the middle of my quad. Nothing terrible, but pain nonetheless. Any possible association?

I had/have some significant arch pain that turned into PF. The inner arch felt really tight for several days, then my heel started hurting. Seriously stretch, ice, and rest that arch. You do NOT want more damage.

Stop running immediately and just shut it down for 4-6 weeks. Trust me, you do not want to try to power through this, even with intensive stretching/icing/etc. The longer you go, the worse it will become and the longer your recovery/healing will take. Once it stops hurting, make sure you give it another 2-3 weeks to fully heal. During this time you need to stretch your calves and foot, look online for ballet dancer arch stretches, no one puts more strain on their arches than them. When you come back your options are either to continue to strengthen/stretch your arches/feet....or resign yourself to insoles with arch support. Note that relying on arch support shoes means your feet will become weaker and you will be more prone to future injury.