The product, Sigma is built to produce the controlled thermal shocks. The depth of the impacts of heat and cold gets adjusted through the manageable combination of the differential hyperthermia and the transdermal cryothermia. It is very useful in the first phase of the rehabilitation when the fast reduction of pain, the swelling and the impaired joint mobility are particularly required. When used along with the therapeutic exercises, the product becomes very effective even in the subsequent later stages of the rehabilitation. The Sigma is on the foundation of a global therapeutic technology and thus anticipates the treatment for all the phases of the pathologies and the wounds no matter in which phase such like acute, sub-acute and chronic, they are in. It allows to perform the specific treatment intended for the specific therapeutic goal like the pain reduction or vascularization improvement for the layers placed in depth or the recover joint movement. This automatically operated medical device can be utilized with no operating costs for its non requirement of the consumables. Sigma is compliant with the Directive 93/42/EEC.