A transcutaneous magnetic stimulation (tMS) device is provided for modulating nerve function and chronic pain management, and includes a tMS stimulator, a control module in wired and powered communication with the tMS stimulator, and a portable electronic device in wireless communication with the control module to receive, generate and transmit feedback and control settings relating to a treatment session. The tMS stimulator may be a flexible figure-of-eight coil configured in different sizes and shapes to provide varying pulse and magnetic field strengths for mobile, home or clinical uses, and also include guidance tools and measurement sensors to aid in positioning and directing the tMS stimulator to a target area for treatment.