aching arches

This is the third time I've experienced this after an exercise this past week. First time I was doing a dance workout, waited a few days to recover and tried Yoga. Same thing happened again! and then today after recovering a day I was doing lunges and squats and it happened again! I just don't understand it, I stretch my feet and ankles before every workout (I also work out barefoot for better traction.) but 3 times now almost immediately after the workout I can barely walk from the pain in my arches. What am I doing wrong? How can I prevent this from happening again? Also, any ideas on how to relax these sore muscles so it is easier to get around?

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