Again this can be due to low oxygen supply to brain where the blood supply to brain is temporarily cut off generally due to a spasm of the arteries, or a clot or high blood pressure
causing micro leaks in the brain. It is common in people with high
blood pressure, diabetes, peripheral vascular disease, and high cholesterol. Hence all predisposing factors to TIA should be ruled out like polycythemia vera, sickle cell disease, atherosclerosis, diabetes, hyperviscosity syndromes, hypertension etc.