Usually, symptoms of skin allergies-like hives, rashes, redness, and itchiness-last only a few days. If blisters form, they may last for a little longer, but even those usually disappear after a few weeks. In certain cases, especially with particular skin conditions or recurring severe allergic reactions, the skin that's affected may be permanently hardened or thickened. Scratching or rubbing the skin can also cause permanent damage, either by thickening the skin or by scarring the skin after cutting it open.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.