Its close to the knee. Lymph nodes are found throughout the body but popliteal is concerning the knee.
Since there is no options, it could be a chronic obstructive pulmonary disease or Bronchitis
Both are Major leading cause of death in United States
Usually caused by prolong used of cigarette, which filled the patient's lung with harmful chemical substance over period of time
Try sitting up with a correct posture (back straight, head and neck up) and try to take breaks and move around.
