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.
Photo Credit gmast3r/iStock/Getty Images. Constipation can cause the stool in the colon and rectum to become dry and hard, making it uncomfortable to have a bowel movement. Stool softeners can be used to soften the stool and make it easier to pass out of the digestive tract. However, these drugs have several side effects that can cause discomfort and may make it necessary to find alternate treatment options.