The principle of explosion refers to the instantaneous emission of high energy, which penetrates the epidermal layer at a fixed wavelength, reaches the diseased tissue, quickly breaks down the corresponding pigment clusters, and is then engulfed and digested by macrophages.

Finally, the diseased pigment is gradually diluted or even disappeared through the circulation of lymphocyte tissue in the human body. The surrounding normal skin tissue, due to its ability to absorb fixed wavelength lasers, does not cause any damage.