For powerful pain relief of muscles and joints, use Ultra Strength Bengay Pain Relieving Patch. This self-adhesive pain relief patch feels cool when first applied and then targets pain with concentrated, deep, penetrating heat, providing greater flexibility and mobility. This large size is ideal for soothing pain in your lower and upper back, shoulders, and hips. Apply one patch to the affected site for relief where it's needed most. From the #1 doctor-recommended OTC brand for topical pain relief, this patch measures 3.9 by 7.9 inches and comes in a package of four.