 Cryotherapy, cryotherapy, sometimes known as cold therapy, is the local or general use of low temperatures in medical therapy. Cryotherapy is used to treat the variety of benign and malignant tissue damage, medically called lesions. The term cryotherapy comes from the creek cryo, meaning cold, and therapy question marky question marky question marky meaning cure. The most prominent use of the term refers to the surgical treatment, specifically known as cryo-surgery or cryoablation. Cryo-surgery is the application of extreme cold to destroy abnormal or diseased tissue and is used most commonly to treat skin conditions. Cryotherapy is widely used to relieve muscle pain, sprains and swelling either via soft tissue damage or post-apertive swelling. It can be a range of treatments from the very low technology application of ice packs or immersion in ice baths generally known as cold therapy to the use of cold chambers, cold body or partial body cryotherapy and or face masks or body cuffs with controlled temperature, sometimes called felid firm. While cryotherapy is widely used, there appears to be little evidence as to its efficacy that has been replicated or shown in large controlled studies. Also its long-term side effects have not been studied.