Salonpas Maximum Strength Topical Pain Relief Gel-Patch uses hydro-gel based technology plus 4% Lidocaine to provide numbing relief. This product is maximum strength with the highest percentage of Lidocaine available without a prescription, our gel patch helps desensitize aggravated nerves and provide numbing relief. Provides temporary relief of pain and stiffness associated with sore back, neck, wrist, ankle, hip, shoulder, knee and elbow. For penetrating, mess-free and targeted relief, apply patch to manage pain in specific areas. Salonpas is here to help you get through your day with discreet, easy-to-use, topical pain relief for temporary relief of aches and pains.