A stylus and a treatment head for use with a medical device for imparting a force is provided. The stylus allows a practitioner to maintain focus on the treatment location while adjusting placement and force. This is because a light signal is emitted in the vicinity of the distal end of the stylus, proximate the treatment location on the patient. Alternatively, an audible or a tactile signal is employed for feedback. As a safety feature, the stylus is provided with means to allow it to collapse at forces above the acceptable limit.