Numerous complimentary treatments for knee arthritis are available. The supporting evidence to show that they will improve your knee pain and function however are low. Exercise, muscle strengthening and weight loss remain the mainstay of non-surgical treatment.
Many complimentary treatments may have a positive effect on our mental state, which can significantly improve pain and function. Most complimentary treatments have a very low risk of causing harm so if you wish to try them, and find them beneficial, you should consider them as they are unlikely to be harmful.
Acupuncture probably has the most ‘weak’ supportive evidence to support efficacy in knee arthritis. Below is a link to a systematic review: