Sunburn is basically skin cells choosing to die or they’ll become cancerous

After getting exposed to direct sunlight for long, you may get a sunburn, During which your skin turns red and may even hurt. Exposure to sunlight can damage DNA in skin cells. To prevent DNA from mutating the cells, they release a protein that signals your white blood cells to come and kill them.

However, short exposure to direct sunlight is good and much needed as it helps in the synthesis of Vitamin D.

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