Question: how to tell if you have low potassium?
Answer: Weakness and Fatigue. Share on Pinterest. ...  Muscle Cramps and Spasms. Muscle cramps are sudden, uncontrolled contractions of the muscles. ...  Digestive Problems. ...  Heart Palpitations. ...  Muscle Aches and Stiffness. ...  Tingling and Numbness. ...  Breathing Difficulties. ...  Mood Changes.