The following are the things to be avoided in this case: coitus frequens, sleeping after much food, drunkenness, and drinking cold water, a drink immediately after food, and much wine when fasting, because it causes the matter to penetrate to the nerves.600 Every sour thing should be avoided, or the letting of a vein, or remaining long in a bath; the fumes of quick-silver; vinegar, apples, or heavy work after food. Avoid cold air, and every very cold thing especially to the feet, hands, and head, and drink but little, and suffer hunger.601