During sleep, the patient sweats more than when awake, since the innate warmth then consumes more moisture; In addition, breathing occurs during sleep with great difficulty, and this moves the juices inward. Hippocrates says: Profuse perspiration in a dream, in the absence of a cause, indicates that the person who sweats has burdened his body with more nutrients than it can bear.
If the patient is sweating not because he has taken a lot of food, then know that he needs to have a bowel movement. The reason for this is that profuse perspiration, when the strength is healthy, occurs only from the abundance of matter that is subject to expulsion by nature, and such abundance sometimes occurs from the immediate cause, that is, from a recent Overflow, and a recent overflow is caused by food just taken; This kind of congestion is eliminated either by fasting, or by physical exercise, or by naturally flowing perspiration. And sometimes overflow depends on a previous and distant cause and is caused by previously accumulated excesses, and here only emptying helps, cleansing the body of these excesses.
As for perspiration, it sometimes removes only thin, liquid excesses in small quantities, leaving unruly spoiled juices in the body, and burdens the nature, leaving it under the weight of spoiled juice. And this is one of the reasons that weakens natural strength.
Know that the stronger the innate warmth, the more hidden the dissolution of juices occurs, and perspiration occurs only if there are other reasons. Therefore, perspiration in this case goes beyond the natural limits, for it arises either as a result of overflow and large, strong expansion of the pores, or from the inability of the natural force to digest juices well, or from the strong movement of matter.
Most perspiration occurs in acute diseases on the third and fifth days, and on the fourth it appears scantily, and such diseases are only rarely resolved by perspiration on the fourth day. According to testers, it is not often that a patient sweats on the twenty-seventh, thirty-first or thirty-fourth day.
By perspiration one judges by touch whether it is hot or cold, and judges by color whether it is transparent or yellowish or greenish; by taste they know whether it is sweet or bitter, or sour, and by smell they determine whether it is foul or smells sour, sweet or something else. Its composition indicates whether it is liquid or viscous, and its quantity indicates whether it is a lot or a little; the place where the perspiration appears allows you to judge whether it is poured out excessively or insufficiently and from which organ it comes out, and the time shows whether it appeared at the beginning of the disease, during a period of limit or at a decline. The consequences of perspiration indicate whether it is followed by relief or suffering, or chills, goose bumps, etc.