The DSW contained in whitening needle can inhibit cell oxidation, quickly decompose melanin and yellow pigment in human skin, repair damaged cells, supplement and activate whitening factor to renew the whole body whitening factor cells, thus improving a series of youthful fading phenomena such as lack of oxygen and dullness, rough skin, etc., making the whole body skin white and red from the inside out, restoring elasticity, and at the same time diluting the acne and spots that have been formed, effectively improving facial spots.