You should seek professional advice before use if you: have a pacemaker or implanted electronic medical device, are pregnant, have a diagnosed seizure condition, diabetes, cancer, high blood pressure, organ failure, bleeding tendencies, dermatitis, cardiopulmonary insufficiency, heart disease, implants, kidney failure, liver or lung failure, or serious illness. Always stop if anything feels uncomfortable. It is not a medical treatment, a replacement for doctors, medication, or physiotherapy.

Why is it so important to be aware of these contra-indications?