Why does it sting when antiseptic/antibacterial solutions touch an open flesh wound?
In: Biology
Antiseptic solutions are poisons. They kill any living cell. It does not matter if it is bacteria or human cells. It is fine to use on your skin as your outermost layer of skin is already dead and will not be affected by the solution. However if you pour it into an open wound it will start killing off the cells within your wound. When your cells dies they trigger the pain receptors of your nerve system which makes it hurt so that you know not to do that.
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