There are several situations to consider here: (1) a jerking pain occurs in the knee of the driver’s leg, i.e., the right knee while driving, (2) a sharp shocking pin prick pain in the knee while driving; (3) a relatively dull pain of extreme weakness after getting out of the car after driving for a longer period of time; (4) a persistent dull pain in the knee while driving.
(1) A jerking pain that occurs in the right knee while driving is like a Charlie Horse. It is essentially a knee cramp. The tendons and muscles of the thigh and the lower leg that are connected at the knee are pulling at each other due to fatigue. (2) A sharp shocking pin prick pain in the knee while driving indicates that the nerve impulses are not going through smoothly in the knee and the impulses have encountered resistence. The resistence comes from the weak functioning nerves as in sudden numbness in the lower arms and in the hands. In some cases, the nerves are twisted and the neural impulses are not getting through smoothly. (3) A relatively dull pain of extreme weakness after driving for a longer period of time indicates knee joint and knee muscle fatigue. (4) A persistent dull pain in the knee while driving also indicates that the knee joints and knee muscles are extremely fatigued to the point of near exhaustion caused by the low driver’s side sunken bucket seat.