A system for treating a selected dermatological problem and a head. The head may include an optical waveguide having a first end to which EM radiation appropriate for treating the condition is applied. The waveguide also has a skin-contacting second end opposite the first end, which is in contact with the skin, and has a reflection aperture which is substantially as great as the radiation back-scatter aperture from the patients skin. The portion of the back-scattered radiation entering the waveguide is substantially internally reflected therein, with a reflector being provided. The reflector may be angle dependent so as to more strongly reflect back scattered light more perpendicular to the skin surface than back scattered radiation more parallel to the skin surface. The head may also have a mechanism for forming a reflecting chamber under the waveguide and drawing a fold of skin therein.
