If the retention comes from repletion or fullness, if the air be hot and dry, take moderate exercise before meals, and very light diet and drinks, and with your food take garden savory--thyme and origane, if it arises from emptiness and defect of matter: if the weather be moist and moderately hot, avoid exercise and late hours; let your food be nourishing and easy of digestion, such as raw eggs, lamb, chickens, almonds, milk and the like. * * * * * CHAPTER III _Of Excessive Menstruation._ The learned say, that truth is manifested by comparing contraries, and so, as I have above spoken of the suppression of menstruation, it is now necessary that I should treat of excessive menstruation, which is no less dangerous than the former. This immoderate monthly flow is defined as a sanguineous discharge, as it consists merely of blood, wherein it differs from the false courses or whites, of which I shall speak further on. Secondly, it is said to proceed from the womb; for there are two ways in which the blood issues forth; one by the internal veins of the body of the womb (and this is properly called the monthly flow), the other is by those veins which terminate in the neck of the matrix, which Aetius calls haemorrhoids of the womb. In quantity, Hippocrates said, it should be about eighteen ounces, and they should last about three days: and when the faculties of the body are weakened by their flow, we may take it that the discharge is inordinate. In bodies which abound in gross humours, this immoderate flow sometimes unburdens nature of her load and ought not to be checked without a physician's advice. CAUSE. The cause is either internal or external. The internal cause is threefold; in the substance, the instrument or the power. The matter, which is the blood, may be vitiated in two ways; first, by the heat of the constitution, climate or season, heating the blood, whereby the passages are dilated, and the power weakened so that it cannot retain the blood. Secondly, by falls, blows, violent motions, rupture of the veins, etc. The external cause may be the heat of the air, heavy burdens, unnatural childbirth, etc. SIGNS.