A medical device for treating a skin of a patient includes: a radiation source configured to provide radiation a collimator coupled to the radiation source and an optical device for viewing a target area on the skin when a distal end of the medical device is covering the skin. A method of treating a skin of a patient includes: providing a treatment device having a distal end, a radiation source, and a collimator, wherein the distal end is configured for placement over the skin of the patient so that the skin of the patient is covered by the distal end of the treatment device and providing an image of a target on the skin when the distal end of the treatment device is covering the skin of the patient.
