Dysmenorrhea is painful menstruation. The most frequent forms are due to uterine congestion; to mechanical causes, as a narrowing of the cervical canal, particularly at its internal opening, or to a constriction caused by the bending over of the uterus at the junction of the body and the neck; or to ovarian irritation.
The pain varies in intensity from slight discomfort to the most intense uterine colic, which is experienced in the lower part of the abdomen. In severe cases the general health becomes undermined, the nervous system gives way, and hysteria and other disorders of the nervous system result.
The congestive variety usually occurs in patients who have previously menstruated painlessly. The pain comes on suddenly with the flow and ceases when the flow stops; it is very severe and is generally accompanied by a diminution or a cessation of the flow. There is severe headache, marked diminution in the secretion of the kidneys, and general restlessness. The patient frequently experiences pain in walking, is easily fatigued, has leucorrhea and an irritable bladder.
In ovarian dysmenorrhea the pain precedes the flow for several days and ceases when a free flow is established. The pain is of a dull aching character, and may be felt on one or both sides of the abdomen, according as one or both ovaries are involved.
Amenorrhea. In amenorrhea the menstrual flow may not appear for some years after it is normally due; or the flow may cease after some months or years of continuance; or the flow may be abnormally scanty or even absent.
The menstrual flow is much later in appearing in some families than in others, so that this may be considered as a family idiosyncrasy; and if the girl's health is good, it need cause no anxiety. If, on the contrary, the girl has severe headaches, or suffers in any way, the physician should be summoned at once, as the absence of menstruation may be indicative of some serious pathologic condition,
A scanty flow is often indicative of thinness of the blood; on the other hand, serious anemias often lead to profuse menorrhagias or metrorrhagias, as has already been stated. The cause of the profound anemia itself may be insufficient nutrition, overwork, or lack of exercise.
Scanty menstruation is often seen to occur in fevers, in the later stages of consumption, in advanced Bright's disease, in malaria, or in any other very serious disease. In these cases it seems to be a conservative process on the part of nature in the run-down state of the system. As consumption progresses menstruation generally ceases absolutely, never to return again; and in this case nothing should be done to try to induce a return of the flow.
Great shock sometimes causes a sudden cessation of the flow; and sometimes a sea-voyage, followed by the change of habitat, will cause an obstinate form of amenorrhea.
But it cannot be too well understood that, after the menstrual flow has been regularly established, it continues with the greatest regularity throughout the child-bearing period, unless the exposure to wet or cold has been sufficiently severe to cause great indisposition on the part of the woman. In this case it is possible that, if the exposure took place just previous to the time of the expected flow, one period may remain out. But except in case of serious illness, as for example, typhoid fever, two or more periods do not fail to appear except in the case of pregnancy.