A method, a system and a device for reducing energy leakage from an energy treatment device or system include at least one energy source, at least one sensor to detect energy associated with the at least one energy source or with ambient energy outside the energy treatment device, and a controller to enable a therapeutic energy source upon receiving a signal from the sensor indicating sufficient contact between the energy treatment device and a surface to be treated by the energy treatment device, such that a probability of energy leakage from the device during treatment may be reduced.