Heat and Cold Therapies are the two most common types of passive, non-invasive, and non-addictive Therapies. Heat and Cold can be used alternatively.

Heat Therapy induces vasodilatation: drawing blood into the target tissues. Increased blood flow delivers needed oxygen and nutrients, and removes cell wastes. The warmth decreases muscle spasm, relaxes tense muscles, relieves pain, and can increase range of motion.

Cold Therapy produces vasoconstriction, which slows circulation reducing inflammation, muscle spasm, and pain. The duration of Cold Therapy is less than Heat Therapy; usually less than 15 minutes. The effect of cold is known to last longer than heat.