TDP stands for "Special Electromagnetic Spectrum" in Chinese, and the lamp has been used in China and other Asian countries for over 10 years. An infrared lamp, it works by emitting an infrared spectrum which is specific to the mineral plate on the lamp head. It has gained world-wide renown for relief of pain, and helping stimulate blood flow in the area exposed, relieving muscle and joint stiffness, muscle spasms, sprains and strains. The TDP Lamp has proven almost miraculously effective in soothing medical conditions such as muscle and joint stiffness and pain, and muscular back pain.