I have been experiencing random electri shock feeling pain in my left knee. It lasts about 10-20 seconds and it doesn t happen every day. It happened last night when I was sleeping and it woke me up. It happens when I sit, stand, walk, sleep, etc. Nothing seems to trigger it. I do notice that if I push on the spot that feels the pain, it does feel a little tender afterwards. But otherwise, I have no pain afterwards. I want to know what kind of doctor I should see.