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.
Here are the most common causes and treatments for a hard stomach: When your body breaks down food, sometimes gas can result. A buildup of gas leads to bloating, or a swelling of the stomach and abdomen. This swelling can make your stomach feel hard, sometimes brings pain and might make you feel general discomfort. This is often caused by various foods or beverages, swallowed air, some medical conditions, constipation or medications.