Nevertheless, he considered it valuable when used in conjunction with hydrotherapy, thermotherapy, and other methods. Laser-induced interstitial thermotherapy (LITT), or interstitial laser photocoagulation, also uses lasers to treat some cancers. Other methods such as thermotherapy and cross protection have also been used in the past. Weak evidence supports the use of wax baths (thermotherapy) to treat arthritis in the hands. Thermotherapy increase the extensibility of collagen tissues. A common technique used in the past is thermotherapy. Thermotherapy is generally used in animal physical therapy before strength building exercises and hydrotherapy.