pain in bottom of foot

cmreynolds98

Several years ago, I was told I have Plantar Fasciitis. it hasn't really bothered me lately. I teach so I am on my feet a lot. This past Wednesday night, I was at Zumba when the bottom of my foot became really tight and I felt a small pop. I slowed down yet finished the workout. I took the last two nights off and today I decided to walk on the treadmill for a bit. After 20 minutes, the tightness resumed. It is not painful to walk on. Has anyone else ever experienced this? Thanks!