How does GFOUK Medic Wave Thermal Laser Joint Care Pen Works? GFOUK Medic Wave Thermal Laser Joint Care Pen emits low-level light energy, often in the red or near-infrared spectrum. These wavelengths are chosen because they have the ability to penetrate the skin and reach deeper tissues. One of the key benefits of thermal laser therapy is its anti-inflammatory effects. It can help reduce inflammation in the targeted area, which is particularly beneficial for joint conditions associated with inflammation, such as arthritis.