Orthotics can be very effective in treating conditions such as plantar fasciitis, tendonitis, bursitis, diabetic foot ulcers, and heel pain. They provide extra cushioning and/or stability to keep feet in proper alignment, and can alleviate foot pain and improve the function of your feet.Orthotics are different than regular inserts as a break-in period may be necessary, depending on which type of orthotic you are using and the health of your feet. If your legs hurt or if you have sore feet, it could be due to wearing them longer than you should during the first few weeks. Participating in intense activities too quickly or wearing them in shoes that have stretched out or broken down could also cause problems. Your feet need time to adjust to the new foot posture, which can take three to four weeks.