A thumb tool for use by a massage therapist includes a tubular sleeve having at least a portion of which is a rigid plastic tubular sleeve that slides over the thumb. A portion of the tool may include a flexible PVC thermo plastic membrane. The tool may be a one-piece construction or may include multiple layers or removable inserts. The tool and/or an insert may comprise a gel-like substance acting as thermal medium that may be heated or cooled for individualized thermal therapy.