Devices and methods for contactless skin treatment use feedback power control for non-invasive treatment of skin and human tissue. Electromagnetic energy heats skin or tissue. A feedback system measures an output physical quantity before the output of electromagnetic waves from the device into the patient. Alternatively the feedback system scans values of a physical quantity on or near the patient. The devices and methods allow for delivering the optimum amount of energy to the patient while reducing the thermal load of the device.
