Magnesium and potassium, along with sodium and calcium, are examples of electrolytes that are present in the blood. Electrolytes help trigger and regulate electrical impulses in the heart and low levels of magnesium and potassium can lead to an electrolyte imbalance, which can contribute to arrhythmia.
Passing hard stools is usually as a result of constipation or the infrequent movement of the bowels. Most healthy people have at least three bowel movements per week, according to MedlinePlus. If you are unable to have a bowel movement or are having difficulty passing stool, contact your doctor.
Softening Stool through Diet. 1  1. Drink more water. Dehydration can cause your body to extract as much water as it can as foods move through your digestive tract, producing dry, hard stool. 2  2. Eat foods that have slight laxative effects and are high in fiber. Some of these, like prunes, have sorbitol. 3  3. Eat more fiber.