It is ok to do two BFST treatments in a row on the same area, but it will not help you to heal any faster than doing four regular treatments a day. The increase in blood flow lasts approximately four hours after each twenty minute treatment you do with the BFST, which is why about four treatments spaced four hours apart from each other a day is ideal. However, doing back to back treatments with the BFST may help symptomatically with the pain from conditions such as arthritis. To improve the longevity of your BFST, give the device five minutes to cool down in between treatments.