Roughly 8 years into chronic fatigue and a new symptom for me. It feels like theres a low but fast rumbling I guess I would say from the top to the back of my head, it only lasts a few seconds at a time. It has been coming and going occasionaly over the past week or so since supplementing with B2 and L-arginine. Don't know if theres a connection or it would have happened anyway. Anyone else experience this?