Hi
I've had MS for 22yrs and it wasn't until late I got symptom. It's would happen when fatigued or over heated and before bed. It was very annoying it did pass. I had to up my dose of Neurontin for other reason so it could have been that as well.
I have the vibration paresthesia - it feels like my foot or hip is buzzing, but only when I put pressure on it. It's caused by damage to the spine.
All I can think of is restless leg. Sometimes when I get it the feeling is internal buzzing. Other than that I have no idea.
Barb