Ok can low blood flow in the body cause muscle twiching in the arm and legs and back. also have tightness on left side vain on neck and it feel compre?

Twitching: muscle tightness and twitching is usually an indication of magnesium, potassium or calcium deficiency, mostly magnesium. Low blood flow would cause lowering of blood pressure and dizziness, fatigue. If we are talking about compression locally like a limb, reducing blood flow, or falling asleep from lack of blood flow that usually exhibits and pins and needles sensation.