I hear that this is a common problem in ballet. I know a lady who teaches in Indianapolis and she told me that is true.
I had PF so bad that I was desperate and I tried the new Arch*Rite. I had to quit running and basketball of which I love. I put these on and in 30 days my problem was history. I've gone back to both and I play raquetball also. I put them on in the morning and took them off at night. Now I just wear them when I am doing foot pounding. This product would be ideal for you because it goes around the foot and is attached with velcro type stuff. It is a soft material and will not come off when you are doing your pointers. It is available from you podiatrist or United American Medical @ 1-800-521-5002 and costs around $20 from United. Good Luck