The present research is based on the study of the efficacy of low-power laser analgesia in the treatment of dentin hypersensitivity and how this method can achieve an effect on the reduction of pain caused by external stimuli to the oral cavity?. This literature review was carried out consulting various scientific sources, using keywords such as: "laser analgesia", "dentin hypersensitivity" and "low level laser"; for therapeutic and pain-reducing uses. A total of 18 scientific articles comparing the analgesic efficacy of therapeutic laser in the treatment of tooth sensitivity were evaluated. Electronic search engines such as Hinari, PubMed and Ebsco were used to search these articles, as well as Journals such as: J Int Oral Health, J. Appl. Oral Science, Journal of Dental Research, Dental Clinics, Dental Prospects, Journal of Oral Rehabilitation, Community Dentistry, Contemporary Clinical Dentistry, Int J Prev Med, PLOS ONE, Dental Clin Oral Invest. Specific journals on the use of therapeutic lasers such as: Journal of Cosmetic and Laser Therapy were searched. Were mentioned in this review, studies that include low-level laser therapy (LLLT) such as: He-Ne laser (Neon Helium laser), CO2 laser, the Nd:YAG Neodymium laser), the GaA laser (Gallium Aluminum Arsenide laser) and the GaAs (Gallium Arsenide laser) laser. Studies that mentioned dentin hypersensitivity, caused by teeth that have fissures, restorations or fillings on any of their faces, fractures or periodontal disease were excluded. Several studies have concluded that low-power laser therapy has a high percentage of effectiveness in the treatment of dentin hypersensitivity. [ABSTRACT FROM AUTHOR]