Treatment systems, methods, and apparatuses for improving the appearance of skin and providing other treatments

A method for improving the appearance of skin by tightening the skin, improving skin tone or texture, eliminating or reducing wrinkles, increasing skin smoothness, or improving the appearance of cellulite, the method comprising:

• cooling a surface of a patient's skin at a treatment site to a temperature in a range of about −30 degrees C. to about −5 degrees C.;
• detecting a freeze event in the patient's skin;
• and
• controlling a cooling device to continue cooling the patient's skin after the freeze event is detected and to maintain at least a partially frozen state of a tissue at the treatment site for a period of time longer than about 10 seconds and shorter than about 5 minutes to improve the appearance of the skin, wherein the improvement in the appearance of skin does not include significant lightening or darkening of a color of the skin such that the color of the skin at the treatment site within one or more days after the freeze event ends is substantially identical to the skin's color at the treatment site immediately prior to cooling the surface.