After your first PIT treatment pain relief can be anywhere from four hours to four days. When the pain returns we look for a reduction of pain intensity and the size of the painful area to become smaller. Initially I often suggest 3 treatments one time per week to see if this is an effective treatment method; if there is a good response, then usually the frequency of appointments will decrease over time until you are pain-free or much improved.  As tissue heals fewer injections are required and pain relief lasts longer.