dear stacey and all, extrapolating only from personal experience, there is no reason that either treatment would interfere with breastfeeding. however, she should see a podiatrist that is very experienced with the latest treatment of this problem, including using splint(s) at night, unless she wants her problem to possibly worsen, or to be walking with a cane in ten years (been there, done that). carol brussel IBCLC now walking well, thanks to dr. ballow, the world's greatest podiatrist who is ALSO breastfeeding-friendly