New Doc Therma heat pad for neck pain 4 pcs doc Therma Simply heat. The beneficial effect of heat: Heat is a proven method for muscle and joint pain. Long-term and deep heat have the property of relaxing cramped muscles. In the case of joint problems, heat can alleviate the symptoms, such as pain. The doc Therma heat pad effectively relieves muscle and joint problems as well as tension with its pleasant and well-tolerated warmth in the neck and shoulder area. The soothing heat effect has a positive effect on joint pain and relaxes cramped and strained muscles. The doc Therma heat pad contains a mixture of activated charcoal, iron powder and water, which changes when it comes into contact with Oxygen is heated. The doc Therma heat pad is placed on the painful area on the skin and fixed with two adhesive dots. Duration of effect: at least 8 hours. doc Therma. Precise, intensive and compatible. The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required. The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required