You can change the way you play, stand and apply pressure on the back of your foot by some corrections in your foot play. With these corrections you will no longer put that pressure on the back of your foot. Selecting footwear is very important for you knowing the flat foot you have, take the help of a specialist in selecting the footwear, take care!
Thank you, iwill monitor how I play and weight distrubution on my left foot. I have looked for arch supports, but I live outside of the US and limited on what is available in my area. Thanks again
Ok, take time in selecting the foot wear and correct your problem before playing golf. As your health is most important and you should avoid causing any more trouble. Take care!