Why are wounds itchy? It seems counter productive for you to scratch at a scab or wound.
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I did a pain management course once and learnt that itching is actually on the pain continuum. It’s a very mild pain signal.
I suppose the survival value is that it keeps you aware of the wound and perhaps helps you avoid damaging the vulnerable area while it completes healing. (Except if you scratch it!)
As it heals the wound goes from painful to itchy to healed.
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