The sun generates ultraviolet rays that are both beneficial and harmful. Ultraviolet rays help the body produce Vitamin D which is necessary for a number of purposes.
At the same time, the rays could be potentially harmful and cause sunburn. Sunburn is also known as photosensitivity which can be damaging, causing changes in skin texture, skin rashes and above all, skin cancer.
Sunburn is the effect of overexposure to ultraviolet rays beyond the capacity of melanin, the body’s natural protective pigment to offer protection. Initially the effects of sunburn are not apparent though the damage is complete. The skin slowly becomes red and painful with the most severe effects within 6 to 48 hours from exposure.
Symptoms are usually a painful, reddened skin which might progress to swelling and blisters depending on the severity of exposure. In acute cases the injury may progress to fever, chills and weakness, while in extreme cases the patient may go into shock.
Days later the skin will probably peel which may be accompanied by severe itching. The skin will remain sensitive for several weeks.
Photosensitivity is when people develop an allergy to sunlight with exaggerated reactions to ultra violet rays. People with highly sensitive skins, extremely prone to photosensitivity can break out in a rash or show some other reaction when exposed to the slightest light even that of an indoor fluorescent bulb.
Vitamin B12 is one of the most complex vitamins in the B group. It plays an important role in the proper functioning of the brain and nervous system and in the production of blood.
There is no apparent connection between B12 and photosensitivity except in cases of an allergic reaction to B12 supplements. The symptoms are itching and rash which have a similarity to the symptoms of photosensitivity.
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