A method of treating erythematotelangiectatic rosacea or papulopustular rosacea in a subject comprises exposing the subjects skin in need thereof to narrow-band infrared radiation at a wavelength(s) in a range of between 790 nm and 900 nm and having a band width of between 0 nm and 20 nm, in an effective dose to treat erythematotelangiectatic rosacea or papulopustular rosacea and essentially not to cause photothermolysis of the skin. Alternatively, a method of treating erythematotelangiectatic rosacea or papulopustular rosacea in a subject comprises exposing the subjects skin in need thereof to narrow-band infrared radiation at a wavelength(s) in a range of between 790 nm and 900 nm and having a band width of between 0.1 nm and 20 nm, in an effective dose to treat erythematotelangiectatic rosacea or papulopustular rosacea. A kit for such methods comprises a radiation source generating narrow-band infrared radiation at a wavelength(s) in a range of between 790 nm and 900 nm, the narrow-band infrared radiation having a band width of between 0 nm and 20 nm and having a power density of between 1 mW/ cm2 and 100 mW/cm2, and a manual instructing a user how to use the narrow-band infrared radiation for treating erythematotelangiectatic rosacea or papulopustular rosacea.
