Hi... Ankle pain may be due to previous injury... Since you had a PRP shot it will help in healing the ankle joint... I suggest you to kindly properly get your muscles rehabilitated following the shot.. Good arch support... Ankle strengthening exercises... like calf raises.. Pushing a sand bag towards outside with ankle..pushing a sand bag towards the other leg...Stretch your leg place sand bag on too of your foot and lift toes up.... Glute rehab like Bridging...clamshell..side leg lifts... leg kicks... Standing on single leg... bending from your hip with knee slightly bent and reaching the toes with back straight Do these exercises for 6weeks... follow up your rehab session with icing yir ankle with compression... Hope this is helpful. Kindly revert back in case if you need further clarification....