Suggest Treatment For Pain In The Knee

DOCTOR GOOD AFTER NOON I WAS WALIKING AND RUNNING IN TREAD MILL TWO WEEKS SUDDENTLY I GOT PAIN IN MY LEG KNEE BOTTOM SIDE.I WENT DOCTOR AND HE PUT ME ON REST AND VOLTARIN OINMENT.XRAY IS NORMAL.I AM UNABLE TO PUT WAIT ON THE KNEE ITS PAINING SINCE TWO WEEKS WHAT IS THE CAUSE AND WHEN IT WILL BE OK.mY BLOOD SUGAR FASTING IS 113,IST THE CAUSE IT TAKE LONG TIEM TO RECOVER PLS ADVISE