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.
What causes constipation. Constipation occurs when too much water is absorbed by the colon or when your colon's muscle contractions are slow, causing the stool to move slowly. As a result, stools can become hard and dry. The main causes of constipation can be attributed to a variety of factors including: 1  Low amount of fibre in the diet.