The device for ultraviolet radiation treatment of body tissues includes a UV light source, a halogen light source and a viewing mechanism all connected to a trifurcation joint by fiber optic cables. All three fiber optics cables are bundled together and exit the trifurcation joint and form a flexible shaft having a distal tip. The distal tip is polished to radiate collimated light. The device allows a user to illuminate the target area in or on the human body via the halogen light, to view the target area via the viewing mechanism, and to treat the body tissue via the UV light source. For destroying pathogens the UV light is calibrated to 253.7 nanometers, a germicidal UV wavelength, by selection of a specific light bulb. The UV light source may be a mercury light bulb and it is maintained at a constant wavelength using a fan to regulate the temperature within the UV light housing.