Before being approved for marketing, the light shield laser therapeutic instrument has been strictly tested by the US Food and Drug Administration for its efficacy and safety, including allergic rhinitis, chronic rhinitis, atrophic rhinitis, sinusitis, chronic pharyngitis, otitis media, tinnitus and many other patients, which proves that the therapeutic instrument is a functional therapeutic instrument with remarkable curative effect. After the product came out, it was deeply loved by patients and otolaryngologists because of its characteristics of painless, no injury, no medicine and no side effects of surgery.