A method and device for treating biological external tissue using at least one energy source. The energy source can be incoherent light, coherent light, a radio frequency, ultrasound, a laser, or any other type of energy that can be applied through the device. The features of various embodiments of the device include the generation of positive pressure and/or negative pressure through one or more pressure conduits, the application of an object within a recess of the device, and measurements through various sensors on the device. These sensors can be monitored and/or controlled through a display element having rows and columns of pixels on the device. The device can be a handheld device or an add-on to existing devices in some embodiments, and can include skin color sensors, temperature sensors, and capacitance sensors.