päikeseluainehaiguse
Päikeseluinehaigus, also known as solar urticaria, is a rare photosensitivity disorder characterized by the development of urticarial lesions upon exposure to ultraviolet (UV) radiation. The condition is believed to be caused by an abnormal reaction of the skin to sunlight. When skin is exposed to specific wavelengths of UV light, typically UVB and/or UVA, a substance within the skin is thought to be altered, leading to the release of histamine and other inflammatory mediators. This release triggers the characteristic hives, itching, and burning sensations.
The onset of symptoms is usually rapid, occurring within minutes to hours after sun exposure. The affected