CAVA: Electrode Pad Appraisal Trial

Participants wear six electrode pads in total; three different types of pad, worn in the same positions on both sides of the face. The pads on the left-hand side of the face are replaced daily, and those on the right-hand side are replaced every other day. The pads do not administer a medical treatment or perform any other active function. The purpose of the intervention is to determine which combination of pad and replacement regime maximises the tolerability of wear over a 30-day period.