Celsus, De Medicina
W. G. Spencer, Ed.

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11 Generally also preceding fevers there is a chill, and that is a most troublesome class of malady.[p. 275] When it is expected, the patient is to be prohibited from drinking anything: for this, given a little while beforehand, adds much to the illness. Likewise he is to be covered up quite soon with a quantity of bed-clothes; to the parts about which we feel concern there are to be applied such dry and hot foments as will not immediately set up a very vehement heat, but gradually increase it. The said parts are also to be rubbed by hands anointed with cold olive oil, to which has been added one of the heating agents. And some practitioners are satisfied with one rubbing of any kind of oil. During remissions of these fevers, some give three or four cupfuls of barley water even although some fever still persists; then, the fever having definitely ended, they reinvigorate the stomach with cold and light food. This, I think, should be tried only when there has been little benefit from food given once and at the end of the paroxysm. It must be carefully looked to, however, that the time of the remission is not deceptive; for often in this class of illness the fever seems to diminish, and then again becomes intense. Some degree of trust must be placed in that remission which is prolonged, and diminishes restlessness and the foulness of the mouth which the Greeks term ozaena. This is pretty generally agreed, that if the daily paroxysms are equal, a little food should be given every day: if the paroxysms are unequal, food should be given after the more severe, after the slighter ones hydromel.