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.
There are 3 different levels of MCL sprain and the symptoms depend on how severe the sprain is. 1  1 st level sprains: Several ligament fibres are torn. 2  It will be painful to bend the knee and it will sore to touch.3  There is usually little or no swelling.here are 3 different levels of MCL sprain and the symptoms depend on how severe the sprain is. 1  1 st level sprains: Several ligament fibres are torn. 2  It will be painful to bend the knee and it will sore to touch.