Let us first consider the girl whose monthly flow is scanty or entirely absent. She has arrived at the age of sixteen years and has not “seen anything.” But every month, for a year or so, she has had headaches, felt extremely nervous, had some pains, the breasts have felt tender and sore, and altogether she has had a miserable twelve months of these symptoms, but no relief from a flow. What is the matter with such a girl? Remember I told you that the womb was pear-shaped, the small end hanging down. Here is a little opening, through which the menstrual blood flows, and then out of the body. The womb is in reality only a big bunch of muscles so arranged that it can relax and empty itself and then tightly close. In the unmarried woman, or before one has given birth to a child, this little opening is completely closed except during the period. Even then it is only very slightly opened, but open and shut it must if a girl is to be in good health. A girl may have over-exercised or injured herself when she was twelve years of age or thereabouts, and brought about a little inflammation, which at the time she knew nothing about. The womb was already getting prepared to do its monthly work, and as the weeks went on the inflammation increased. Inflammation always means some kind of an extra growth at the injured spot; like a scar, for example, after a wound has healed up. The womb itself is not a sensitive organ to the touch or to slight inflammations at the lower end, hence the little girl does not, at the time, feel any pain. She may feel uncomfortable in that region, but as she has been brought up NEVER to mention any matters concerning her sex organs, of course she keeps silent while the injury goes on. The little inflammation heals up, but in healing what does it do? Leaves a scar, of course. Now this scar may be big enough to have CLOSED the outlet for the monthly flow――to have made the entrance of the womb grow together. It is under these circumstances a sealed bag; nothing can come away from it. The girl’s time comes, but the blood does not. All the other signs being present, she watches and worries. Sometimes, alas, too many times, she has never been told just what should happen. Backache troubles her, headaches often drives her to take some harmful drug, she becomes fretful, loses control of her temper in the simplest things and finally loses friends because she “is so horrid, says so many cutting things.” Yet she does not mean to be disagreeable; she simply cannot help it. How could she? There is a clot of blood in her womb that cannot come away; it remains and hardens and each month is added to by the banked-up blood. It is a very sad condition, and one that often continues until a tumor is formed, or some other complication makes an invalid of her in the prime of her life――or what should be her prime. This condition is frequently the cause of hysteria, of desperation, of a gradual mental failing.