The present invention relates to a detection system and a method for detecting unhealthy postures of using the keyboard. 1,4,7,10-tetraazacyclododecane-N,N\u2032,N\u2033,N\u2032\u2033-tetraacetic acid or a residue of gadolinium. An annular sleeve is formed on the bottom of the cylinder and engaged with an annular fender on a mounting plate. When used, the device reverses or alleviates hemorrhoids symptoms, due to the force of gravity.