Abstract: A hand-held tool having an electromotive actuation is provided. The hand-held tool has a handle region and a working head. In the handle region, an actuating switch is provided, which is arranged for the application of manual force. The handle region including the actuating switch is sheathed with a flexible sheath part, which, starting from an end of the handle region that is facing away from the working head to beyond the handle region is formed without an opening. A sheath part for a hand-held tool is also provided.

Abstract: A hand-held tool having an electromotive actuation is provided. The hand-held tool has a handle region and a working head. In the handle region, an actuating switch is provided, which is arranged for the application of manual force. The handle region including the actuating switch is sheathed with a flexible sheath part, which, starting from an end of the handle region that is facing away from the working head to beyond the handle region is formed without an opening. A sheath part for a hand-held tool is also provided.

Abstract: A new non-invasive, non-toxic, non-sedating method for treatment migraine, tension and post-traumatic headache, atypical facial pain, and cervical muscle hyperactivity (spasm) is presented. This method comprises the application of cold, through the use of a portable thermoelectric cooler, to an intra-oral area of tenderness which has been found to be associated with the above conditions. New portable thermoelectric cooler devices for use with the intended treatment methods are also presented. In one embodiment, the thermoelectric cooling units are directly housed in the U-shaped mouthpiece. In another embodiment, water is chilled thermoelectrically in a container and circulated through the U-shaped mouthpiece. Alleviation of pain is noted within a short period of the onset of the treatment. Repeated treatment even during pain-free periods offers protracted benefits, i.e., prevention or amelioration of the headaches or other conditions.