6. Breathing difficulties
If you are suddenly having breathing difficulties, it can be caused by severe potassium deficiency. Potassium helps receive and pass signals that stimulate the lung contraction and expansion. So when your body undergoes severe potassium deficiency, your lungs may not contract and expand as it should. This results in shortness of breath, which in turn can cause your heart to beat abnormally. Abnormal heart beating can mean less blood, hence less oxygen is delivered to your body. This can be fatal.