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The therapeutic device is an ultraviolet therapeutic device with a wavelength between 311 and 312 nm. It is divided into whole body and local instruments. The whole body machine is suitable for use in hospitals. The treatment time is very short and very convenient. Partial machines now have a home version that can be purchased at home for added convenience. NB-UVB can treat a variety of diseases such as psoriasis, vitiligo, pityriasis rosea, pruritus, eczema, etc. In order to achieve better results and reduce side effects, please note the following considerations:

1. Try to avoid photosensitizing drugs and food during the light period, and block your eyes when shining.

2, do not use any ointment and skin care products before the skin shines, so that the skin can fully contact with light, reduce the barrier to penetration, psoriasis patients have some thick scales, can wash the bath, gently remove the outer scales It is better to not damage the inner skin, which can improve the curative effect.

3, the light frequency is generally 2 to 3 times a week, when the skin lesions are serious, you can increase the frequency to improve the effect, and the skin lesions gradually improve, you can slowly reduce the frequency, at least 7 to 10 days, usually 10 times A course of treatment usually takes about 3 courses. After a slight improvement, the irradiation can be stopped. If the photo is not improved 30 times, it can be rested for one month and then repeated.

4, each time after the light, the skin may appear red, itchy, pain and other skin reactions, can be adjusted by reducing the dose, frequency and topical emollient to reduce adverse reactions, the skin to avoid other light during the light, long-sleeved trousers in the summer To block.

5, phototherapy has small side effects, good curative effect, has been widely quoted in the clinic, but it also has its contraindications and adverse reactions, short-term adverse reactions such as erythema, itching, dry skin, pigmentation, etc., which can be avoided and improved; In theory, long-term adverse reactions include photoaging, cataracts, skin cancer, and malignant melanoma. However, according to research at home and abroad, there is no clear evidence of an increase in human skin cancer after NB-UVB irradiation. Therefore, NB-UVB is safe and effective.