All day, everyday. Immediately treats your pain at its source. Shock Guard absorbs impact with every step. Is this right for me? Dr. Scholl's Pain Relief Orthotics (P.R.O.) Arthritis is designed for people who suffer from osteoarthritis pain in the knees, feet and hips. How does it work? With each step your take, your foot strikes the ground generating jarring shock that travels up your leg and aggravates osteoarthritic joints. Dr. Scholl's with Shock Guard provides pain relief all day, everyday. Dr.