Definition of phlegm for English Language Learners. : 1  a thick, yellowish liquid that is produced in the nose and throat especially when a person has a cold. : 2  calmness in a difficult or unpleasant situation.
Kneecap (Patellar) Subluxation. A subluxing patella (kneecap) is a temporary, partial dislocation of the kneecap from its normal position in the groove in the end of the thigh bone (femur). This groove is located between two bumps at the end of the thigh bone called the femoral condyles.
Chondromalacia patella refers to the softening and breakdown of the cartilage on the underside of the kneecap or patella. It is one of the common causes of knee pain, especially in women. Chondromalacia patella is caused by misalignment, or improper tracking, of the patella as it slides over the thighbone (femur). The most common symptom is a dull, aching pain in the front of the knee behind the kneecap, which can be exacerbated by prolonged sitting. Potential causes of the condition include muscle imbalances such as tightness in the iliotibial band and weakness in the quadriceps or hip rotator muscles.