One of the risks associated with tanning is sunburn, which occurs when the skin cannot produce more melanin fast enough to prevent damage to the skin and the deeper blood vessels underneath the skin. The damaged blood vessels cause inflammation, and the skin turns red. Sunburns often cause mild to moderate pain. Sometimes, the severity of sunburn is not evident until about 48 hours after the exposure. Severe sunburns may cause nausea as well. Peeling and itching often follow a sunburn. This is the process of white blood cells attacking and removing the damaged skin cells. Many studies link severe sunburn with the development of a dangerous form of skin cancer called melanoma.
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