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.
Common symptoms of jumper's knee include: 1  pain directly over the patellar tendon (or more specifically, below the kneecap) 2  stiffness of the knee, particularly while jumping, kneeling, squatting, sitting, or climbing stairs. 3  pain when bending the knee.  pain in the quadriceps 1  muscle. leg or calf weakness.