There are different specialties that put into practice the use of laser technique in medicine. Its use is extensive thanks to the high effectiveness of the treatments, the minimum risks and the short recovery that it entails for the patient. In summary, it has brought about an authentic revolution giving a quick and effective solution. The areas in which this method is used are: dentistry, urology, aesthetic medicine, angiology or vascular medicine, dermatology, gynecoesthetics, otorhinolaryngology or physiotherapy. Depending on the area where the laser is to be applied, one type or another is applied, among which are: green laser, helium-neon, ruby, CO2, argon, Neodymium-Yag or diode. Diseases and uses that Immunology treats • Urology: lithotripsy in situ, surgery for benign prostatic hyperplasia, tumors and stenosis. • Gynecoesthetics: vaginal rejuvenation, labiaplasty or reduction of labia minora, wart or condyloma removal, urinary incontinence, vulvar or anal whitening. • Dermatology: vitiligo, psoriasis, hyperhidrosis, elimination of spots, elimination of micropigmentation, nevus, acne, warts, etcetera. • Aesthetics: facial rejuvenation, elimination of scars and keloids tattoos. • Vascular: couperose, angiomas, poikiloderma, ruby ​​points, spider veins, hemangiomas, keloids with associated vascularization, acne rosacea, striae or telangiectasia.• Rheumatology: degenerative diseases, arthrosis of the hip, hands, shoulder, cervical dorsal and lumbar, knee; ankylosing spondylarthritis and rheumatoid polyarthritis. • Traumatology: in bony and soft parts (tendinopathies, sprains or ligament distensions), tendons, ligaments and muscles. • Physiotherapy: inflammations, injuries and pain of bone, muscle, tendons or ligaments. • Ophthalmology: cataracts, fundus diseases, pupiloplasty, gonioplasty, trabeculopathy, diabetic retinopathy, prophylaxis of retinal detachment, iridotomy, capsulotomy, correction of myopia and hyperopia. • Coloprcotology: hemorrhoids, fissure and anal fistula or fecal incontinence. • Otolaryngology: tonsillar or nasal obstruction reduction, turbinate surgery, snoring, laryngeal cancer, rhinoplasty or halitosis. • Neurology: neuralgia, stroke and tumors. When to apply the laser technique in medicine Due to its multiple functionality and advantages, the laser method can be applied to a large number of pathologies. Even so, the decision to use it should always be made by a medical specialist. Keywords: laser, facial rejuvenation, laser diode, green laser, angiomas, neuralgia,