I am experiencing brief periods of light headedness. This lasts 2 to 4 seconds. When the feeling is strong I can get blurred vision and come close to collapsing. Today I experienced these symptoms 20 times with two being strong effecting vision and stability. It s a feeling similar to getting up from a squatting position and blood rushes from the head. I feel a warmth come over my upper body and ears for example but the ears or not warm to the touch.