Cold laser is a kind of short wavelength laser, can have some damage to the superficial tissue, but will not damage the deep tissue, less damage to the tissue, so cold laser technology has the advantage of relieving disease symptoms and less side effects, now mainly used in the correction of vision, spot removal, analgesia, oral disease treatment: 1, correction of vision: cold laser that is excimer laser vision correction by computer precision control, precision according to Myopia degree according to different shapes and depths to change the corneal curvature and refractive power to achieve the purpose of vision correction, and does not damage the integrity of the eye structure; 2, spot removal: can be used for the skin surface freckles, coffee spots, age spots, spot removal treatment, with laser broken pigment, pigment decomposition, when the pigment decomposition will be gradually absorbed, the pigment will then become lighter; 3, analgesia: cold laser technology has analgesic effect, the laser can Strong nerve block, promote the release of analgesic substances, reduce peripheral nerve excitability, so as to relieve the patient’s arthritis symptoms, such as back pain, leg pain, neuralgia and other symptoms; 4, treatment of oral diseases: through laser irradiation can promote the growth of new blood vessels and the proliferation of granulation tissue, stimulate protein synthesis, can effectively kill bacteria in the mouth, relieve pain, treat periodontitis, pulpitis, gingivitis, etc. Cold laser treatment is not recommended for those who are intolerant to laser surgery, scarred people, pregnant women, etc. If you have treatment needs, you should first go to a regular hospital for relevant examination, and the doctor will make a clear diagnosis with clinical symptoms and give a reasonable treatment plan.