What is ADHD? ADHD (attention deficit-hyperactivity disorder) affects both adults and school-aged children. Symptoms include restlessness, difficulty paying attention, and hyperactivity. The causes of ADHD are unknown, however factors such as diet, environment and genetics may contribute to symptoms.
The knee muscles control how the knee joint and patella move. There are two main groups of muscles, the quadriceps and the hamstrings, as well as a small muscle behind the knee (popliteus).
If these areas are aggravated, either through a direct injury or over time, then a person may experience pain behind the knee. What causes pain behind the knee? In addition to pain behind the knees, you may also experience some of these symptoms: Swelling behind the knee; A lump behind the knee; Fluid around the knee; Clicking knee; Sensation that the knee is locking; It is important to note these symptoms to discuss with your physician during your visit. The following are the most common causes of behind knee pain: Baker's cyst- Also