Do straps help?

Had X-ray on knee over 4weeks ago which has not been reviewed yet😏. Am assuming it is arthritis as I have arthritis in both ankles. It is very painful at the moment and I have started wearing a strap but not sure if it’s doing any good or not. Getting frustrated now as it’s stopping me doing things and don’t seem to be getting anywhere with a diagnosis☹️. Does strapping the joint help? Many thanks!