Erythema
The measurement of erythema is a method of detecting or treating a certain disease by using the time required to irradiate the skin to cause erythema and the time when the erythema disappears when there is a certain distance between the ultraviolet lamp and the skin. Ultraviolet rays are also called chemical rays. The erythema reaction produced after irradiation of the body has the effects of anti-inflammatory, swelling, analgesia, desensitization, and metabolism enhancement.
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