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A phototherapy unit is a medical device used to treat certain skin conditions, such as jaundice, psoriasis, and eczema, by exposing the affected area to light of a specific wavelength. Phototherapy units can use either ultraviolet A (UVA) or ultraviolet B (UVB) light, or a combination of both. In the case of jaundice, a common condition in newborns that causes yellowing of the skin and eyes, phototherapy units use blue light to help break down bilirubin, a substance that can build up in the body and cause the yellowing. The blue light helps to convert the bilirubin into a form that can be excreted from the body more easily.
For skin conditions such as psoriasis and eczema, phototherapy units use UVA or UVB light to help reduce inflammation and itching. The light therapy can also slow down the growth of skin cells and improve the appearance of the skin. Phototherapy units can come in different sizes and styles, from small handheld devices to larger stand-alone units. Some units are designed for home use, while others are used in clinical or hospital settings. The units may have different features, such as adjustable light intensity and exposure times, to allow for individualized treatment. While phototherapy can be an effective treatment for certain skin conditions, it is important to use it under the guidance of a healthcare professional. Excessive exposure to UV light can have harmful effects on the skin and increase the risk of skin cancer.