Inclusion Criteria:  Healthy men and women 18-80 years Speak and understand English  Exclusion Criteria:  Pregnancy or breast feeding Drug addiction defined as the use of cannabis, opioids or other drugs Previous and present neurologic, musculoskeletal or mental illnesses (e.g., epilepsy, neuropathy, fibromyalgia and depression) Skin diseases Past history of conditions possibly leading to neuropathy Inability to cooperate Current use of medications that may affect the study, e.g., analgesics Previous traumatic experience of an electrical accident Consumption of alcohol or painkillers within the last 24 hours Participation in other pain studies throughout the study period Patients with cardiac diseases (e.g., pacemaker).