"i was prescribed flector patches after surgery to repair my collarbone, which came with frozen shoulder that i&#039;ve been getting physical therapy on for weeks. i have not used the patches regularly, just when i have a little pain. early on i had pain in the shoulder area but could not place the patch directly on the shoulder because of the surgical scar. the patches helped somewhat. now i have some pain for stepping up workouts on the shoulder, and i can place the patch directly on the pain area, and it&#039;s working wonderfully. the patch has a kind of numbing feeling, and overall the feeling can be compared to what ibuprofen does in reducing inflammation. the patches can make me a little sleepy. they also can be a little large for certain spots"