It will not be necessary, however, to use these means, except there is an obvious indication to return the menses.[4] It must be recollected that when the patient labors under some other disease, there is such debility that there is not superfluous blood sufficient to keep up the menstrual discharge; and in this case our attention must be directed to the primary affection, without any regard to such symptoms; it is also very necessary to bear in mind the fact, that the menses are often suppressed from pregnancy. By a proper attention, we can always discriminate between a suppression of the menses and pregnancy; and the principal diagnostic symptom is, that in the former complaint there is a pain or affection of the head, attended with dizziness. PAINFUL AND IMPERFECT MENSTRUATION. _Description._ Besides the two deviations from the usual course of nature already mentioned, there sometimes occurs a third, viz. where menstruation, although not wholly suppressed, is nevertheless somewhat difficult, and accompanied with severe pains in the back, loins, and bottom of the belly. This disease is owing to a weak action of the vessels of the uterus, or spasm of its extreme vessels, and is to be obviated by tonics, warm bathing, both local and general, together with the use of anodynes, which should be employed as soon as the symptoms which denote its approach are apparent. This complaint is a common, and generally an extremely harassing, affection. It may occur at every period during the menstruation stage of life; but it appears to be most common between the twentieth and thirtieth years of age, and in subjects of an irritable and sanguineous temperament. In many instances severe pains are experienced in the back, loins, and lower part of the abdomen for five or six hours previous to the appearance of the menses. This, however, soon ceases, and an immediate aggravation of the torturing pain follows. Sometimes the catamenia begin to flow moderately, with little or no previous pains; but in an hour or two, they become suddenly arrested, at the same time that violent pains come on in the hips, side, loins, back, and thighs, with a distressing sensation of forcing or bearing down. Occasionally a very slight menstrual discharge continues uninterruptedly for three or four days, accompanied throughout with extremely severe pains in the abdomen; and in some rare instances the catamenial evacuation, although attended with great suffering, is sufficiently copious and prolonged in its course, and may even exceed the regular duration and quantity of an ordinary healthy menstruation. _Treatment._