=RUPTURE.=--Hernia or rupture consists in a protrusion of a portion of the contents of the abdomen (a part of the bowel or its covering, or both) through the belly wall. The common seats of rupture are at the navel and in the groin. Rupture at the navel is called umbilical hernia; that in the groin either inguinal or femoral, according to slight differences in site. Umbilical hernia is common in babies and occurs as a whole in only five per cent of all ruptures, whereas rupture in the groin is seen to the extent of ninety-four per cent of all ruptures. There is still another variety of hernia happening in the scars of wounds of the belly after injuries or surgical operations, and this may arise at almost any point. =Causes.=--Rupture is sometimes present at birth. In other cases it is acquired as a result of various causes, of which natural weakness of the part is the chief. Twenty-five per cent of persons with rupture give a history of the same trouble in their parents. Rupture is three times more frequent in men than in women, and is favored by severe muscular work, fatness, chronic coughing, constipation, diarrhea, sudden strain, or blows on the abdomen. =Symptoms.=--Rupture first appears as a fullness or swelling, more noticeable on standing, lifting, coughing, or straining. It may disappear entirely on lying down or on pressure with the fingers. In the beginning there may be discomfort after standing or walking for any length of time, and later there is often a dragging pain or uneasiness complained of, or a sensation of weakness or griping at the seat of the rupture. In case the rupture cannot be returned, it is called irreducible and is a more serious form. The great danger of hernias is the likelihood of their being strangulated, as the term is; that is, so nipped in the divided abdominal wall that the blood current is shut off and often the bowels are completely obstructed. If this condition is not speedily relieved death will ensue in from two to eight days. Such a result is occasioned, in persons having rupture, by heavy lifting, severe coughing or straining, or by a blow or fall. The symptoms of strangulated hernia are sudden and complete constipation, persistent vomiting, and severe pain at the seat of the rupture or often about the navel. The vomiting consists first of the contents of the stomach, then of yellowish-stained fluid, and finally of dark material having the odor of excrement. Great weakness, distention of the belly, retching, hiccough, thirst, profound exhaustion, and death follow if the condition is not remedied. In some cases, where the obstruction is not complete, the symptoms are comparatively milder, as occasional vomiting and slight pain and partial constipation.