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.
Constipation is the passing of hard, dry bowel motions (stools) that may be infrequent or difficult to pass. The most common causes of constipation include a change in routine, not enough fibre in the daily diet, not enough fluids and lack of exercise. See your doctor for diagnosis and treatment. It is important not to over-treat constipation with laxatives in place of seeking medical advice.