It may be enough to allude to the famous dream which Hood traces to an excessive indulgence at supper.

It is known that the varying condition of the organs of secretion influences our dream-fancy in a number of ways.
Finally, it is to be observed that an injury done to any part of the organism is apt to give rise to appropriate dream-images.

In this way, very slight disturbances which would hardly affect waking consciousness may make themselves felt during sleep.

Thus, for example, an incipient toothache has been known to suggest that the teeth are being extracted.[88] It is worth observing that the interpretation of these various orders of sensations by the imagination of the dreamer takes very different forms according to the person's character, previous experience, ruling emotions, and so on.

This is what is meant by saying that during sleep every man has a world of his own, whereas, when awake, he shares in the common world of perception.
_Dream-Exaggeration._ It is to be noticed, further, that this interpretation of sensation during sleep is uniformly a process of exaggeration.[89] The exciting causes of the feeling of discomfort, for example, are always absurdly magnified.