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Then there was purging and bloodletting.
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There was also the administration of opiates,
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in the nineteenth century, and especially morphine,
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to calm the patient in delirium.
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Astringent eye drops were resorted to.
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A particularly perverse theory, with no empirical basis,
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was the idea that scarring on the face could be reduced or
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prevented by causing more intense irritation of the skin
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elsewhere; so that mustard plasters,
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mercury and corrosives were applied on the back,
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in order to save the face.
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There were also all kinds of local applications to the face,