This was characterized by pallor, progressive impairment of consciousness, and vomiting that lasted 45 minutes.
en.wikipedia.org It is not usually clinically significant unless it is accompanied by a general pallor (pale lips, tongue, palms, mouth and other regions with mucous membranes).
en.wikipedia.org Other autonomic manifestations included mydriasis, pallor, cyanosis, tachypnea, hypersalivation, and perspiration at various stages of the ictus.
en.wikipedia.org After the insulin injection patients would experience various symptoms of decreased blood glucose: flushing, pallor, perspiration, salivation, drowsiness or restlessness.
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