The adductor canal is an opening through which the cutaneous nerve travels to supply sensation to the skin over the inner portion of the knee and down the leg. This soft tissue tunnel is a common point that becomes compressed (pinched nerve) or the mobility of the nerve is limited.
Once the nerve exits the adductor hiatus it supplies sensation to the knee via the infra-patellar branches. The saphenous nerve and its branches also innervate the heavy ligament on the inner knee known as the medial collateral ligament. This is the ligament that prevents your knee from buckling inwards and gives the knee stability. There sudden or repetitive loading of the inner knee can create saphenous neuralgia.
Activities such as running, walking, standing from sitting, and squatting can create pain in the vessels and nerves when the knee travels towards the midline (valgus collapse).