An allergic reaction can cause a neck rash with urticaria (hives), or raised, red ... cracked skin with a silvery sheen on the back of the neck. Bites from insects, including mosquitos, spiders ...

This rash is a form of dermatitis called prurigo pigmentosa, and it triggers raised red spots across the back, shoulders, and abdomen. The cause is unclear, however the rash usually resolves ...

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