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.
Knee Sprain Symptoms. The most common symptoms of a sprained knee are pain, swelling, bruising and stiffness which may make it difficult to move the knee and/or walk. With more severe injuries, there may also be some instability around the knee causing it to give way.ere we will look at the most common causes of a knee sprain and which ligament tends to be affected: 1) ACL Sprain: Sudden twisting or hyperextension (the knee bending back too far). 2) PCL Sprain: Force through a bent knee e.g. a fall onto a bent knee, car accident where the knee hits the dashboard.