UVB ultraviolet light therapy, a dual barrier technology that resists electromagnetic waves and electrical interference, is used to treat skin conditions such as psoriasis. This is a type of physical therapy that is currently used more often, but there is no definitive evidence that it causes skin cancer. Of course, the development of skin cancer is also the result of a combination of effects, which may be related to long-term exposure to ultraviolet radiation, as well as ionizing radiation, genetics, and genetic mutations. At present, in some in vitro tests and animal tests, it is also said that using this phototherapy device can lead to cancer, but it has not been found in clinical practice. Because this amount is also relatively small, it is important to avoid accumulating a relatively large amount. In addition, if local pigmentation and other conditions are found during the treatment, it is necessary to adjust the treatment plan or suspend the treatment in time.