Deep Heat Patch for the effective relief of back pain and muscular aches. Deep Heat Patch for Back Pain: Applying heat to the joints and muscles in your body can help with injury or inflammation. It can help relax the muscles, reduce stiffness, relieve pain and improve the blood supply to the affected area to aid healing. Heat treatment is applied by using a patch that can get to work at the site of the pain, and has long lasting properties. Deep Heat Patch for Back Pain can last for up to eight hours, and pr soothing, controlled heat to tackle such problems as: sore overstretched muscles, back pain, sciatica, fibrositis and lumbago.