Enuresis, or incontinence of urine, is customary in infancy. Just when urination becomes a voluntary act depends upon the development and training of the individual child. As a rule children can be taught to control this function during the day, or while awake, about the tenth month. It is not under control during sleep until a much later period, usually by the end of the second year, but lack of control should not be regarded as abnormal until the child has entered the fourth year. If the child fails to control the act of urination during the day at the end of the second year, and is addicted to habitual bed-wetting, some measures should be adopted to cure the condition. Boys under twelve years of age seem to be affected more frequently than girls. It is wrong to assume that it is caused by negligence or laziness, as some parents do. It has generally a special cause, and the cause usually can be found if it is carefully sought for. It may be the result of bad habits: exposure to cold in the night; lying on the back; drinking too much liquid in the afternoon or at bedtime. It may be due to too much acid in the urine, and if so it will be found necessary to reduce meats and eggs the child is eating. Worms, stone in the bladder, some anatomical abnormality or deficiency, may be responsible for it. The diet may be at fault; adenoids are supposed by some physicians to be the cause. No matter what the actual cause may be, it must be found and remedied before we can hope for a permanent cure. A very large majority of these cases are due to nervousness. These children are of a nervous temperament. They are not necessarily sickly children; they are simply of a nervous type. They are well-nourished, active, and lively. Incontinence of urine during the day and long-continued bed-wetting does not at all affect the health of the child. If they are in poor health, it is essential to treat their general condition before trying to cure the incontinence. It is absolutely wrong to punish or to crush the spirit of these children. Constant nagging and taunting, even if done in the hope of shaming the child into a cure, will simply make a coward of him and will not aid in improving matters, but will be distinctly detrimental. Scrupulous cleanliness must be constantly practiced or these children, if neglected, may develop ulcers and sores of a very obstinate character. The odor is also bad for the health of the child.