In the case of hematochezia, the blood may coat the stool, be mixed in with the stool, or even be passed by itself without any stool at all. Potential causes of black colored stools include: acidified blood (blood from higher in the digestive tract)
The most common symptoms of a meniscus tear are: 1  Knee pain. 2  Swelling of the knee. 3  Tenderness when pressing on the meniscus.  Popping or clicking within the 1  knee. Limited motion of the knee joint.
The most common signs of a knee fracture are pain, swelling, and bruising of the affected joint. A person with this injury will typically have trouble standing on the injured leg, and might have go into shock. Symptoms of shock include chills, pale skin, nausea, and vomiting.