Geriatric warts, also known as seborrheic keratosis, or basal cell papilloma, is a benign cutaneous excrescence. Clinical statistics show a trend toward a younger incidence of the disease, with some patients starting to grow in their thirties, and a fairly high incidence in older adults, with a prevalence of up to 80% in those over 60 years of age. The early manifestations of the disease may be small, flat, yellowish or teal patches that increase in size, thicken, and gradually darken in color, covered with a greasy crust or oily scales, hence the name seborrheic keratosis. The name of the disease is based on the fact that it can be multiple or single, often occurring on the temporal, frontal, cheek, back of the hand, trunk and extremities. Traditional treatments include scraping, excision, freezing, and drug erosion. All of these methods have side effects such as large damage surface, depth of operation is not easy to grasp, and easy to leave scars. The best way to treat old warts is laser treatment, which is the preferred treatment for old warts. It can clearly identify the depth of the lesion removal under direct vision, and generally does not leave a scar. Choice of laser. A variety of lasers can be used to treat seborrheic keratoses. Q-switched laser (wavelengths 532nm, 755nm, 694nm) can be used for early lesions that do not rise above the skin surface, while lesions that rise above the skin surface can be treated with carbon dioxide laser vaporization. If the same lesion has both keratosis pilaris above the skin surface and age spots not above the skin surface, both lasers can be used for treatment. If the number of lesions is large and the distribution is dense, treatment can be done in batches. Age spots that do not rise above the skin surface can be treated with IPL (photon) to achieve a good therapeutic effect, the energy of the intense light can cause the spots to produce a blasting effect in an instant and turn into melanin dust. It can be discharged from the skin surface with the skin flakes, or engulfed by phagocytes and discharged from the body with lymphatic circulation or blood circulation. Very few adverse reactions such as hyperpigmentation and pigment loss occur. Anesthesia. If Q-switched laser treatment is used, the pain level is mild and can be greatly reduced by using a surface anesthetic (e.g. 5% compound lidocaine cream) applied for 1 hour after treatment. For some sensitive areas (such as around the eyes) or larger lesions, local infiltration anesthesia can also be used. The Q-switched laser treatment generally selects an energy density of about 2-5 J/cm2 (Medlite C6, wavelength 532 nm). The energy density is adjusted according to the shade of the color, the darker the shade, the more the tissue absorbs the laser, and the laser energy density should be reduced accordingly. A gentle bursting sound can be heard during the laser treatment, while the skin shows a typical immediate whitening effect. As long as the seborrheic keratosis spots are not particularly thick, they can usually be removed in one go. Post-treatment treatment. After the procedure, it is only necessary to keep the skin free of water, apply a small amount of antibiotic ointment on the surface and wait for the scabs to fall off naturally. The scab removal time is 7-10 days after Q-switched laser treatment and 10-14 days after CO2 laser treatment. The surgical wound should be kept clean and dry for 2 weeks after surgery, avoid scrubbing, avoid sunlight, and use local antibiotic ointment if necessary. The scab should not be forcibly removed and should be allowed to fall off by choice. After treatment, the local skin color may be redder followed by hyperpigmentation, which will gradually fade after 1 to 6 months depending on individual circumstances.