Yes, nervousness can cause hives, or skin rashes. It is known as adrenergic urticaria, or stress-induced hives. And adrenergic urticaria can be reproduced by injecting adrenaline into the bloodstream. So if you notice an association between stress and hives, then you may have adrenergic urticaria. The treatment for adrenergic urticaria is to reduce you stress and anxiety levels.
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