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 symptoms. Knee lesion (symptom description): Knee lesion is listed as a type of or related-symptom for symptom Knee symptoms. Knee lesion (symptom description): For a medical symptom description of 'Knee lesion', the following symptom information may be relevant to the symptoms: Knee symptoms (type of symptom). However, note that other causes of the symptom 'Knee lesion' may be possible.