Here are some of the common symptoms you might experience from an electrolyte imbalance are confusion and irritability, diarrhea or constipation, fatigue, headaches, irregular or fast heart rate, muscle cramps, muscle spasms or weakness, nausea and vomiting, numbness or tingling in limbs, fingers and toes. If you start experiencing these electrolyte imbalance symptoms from exercise or regular activity, electrolyte supplements could be a great option for you.