A physical exam may be the only test done to diagnose a ruptured spleen. The doctor will feel the person's belly area. The abdominal area may feel hard and look swollen (distended) because it has filled with blood. If there has been a great deal of blood loss from the spleen, the patient may have low blood pressure and a rapid heart rate. Sudden low blood pressure in someone who is believed to have a spleen injury, particularly a young person, is a sign that the condition is especially severe, and emergency surgery is needed.