Calcium is a mineral found in milk, dairy products and leafy green vegetables. It can also be obtained by taking a multivitamin or calcium supplement. Calcium is known for its role in the development and maintenance of strong bones and teeth, muscle contraction and blood clotting. Some patients may develop hypocalcemia, which is a low level of calcium in the body. It may cause symptoms depending on its severity.
Neuromuscular Irritability
Low levels of calcium in the blood may cause neuromuscular irritability. Symptoms can include numbness in the fingers or toes, twitching of facial muscles and muscle stiffness and cramping. According to the Cleveland Clinic, hypocalcemia may cause prolonged contraction of the respiratory and laryngeal muscles, which can cause difficulty breathing. If you experience these symptoms, a physician can perform a simple blood test to test your calcium levels.
Dementia
Some adults may develop dementia as a result of low blood calcium levels. According to MedlinePlus, people with dementia may not be able to think well enough to do normal activities, may lose their ability to solve problems or control their emotions and may become agitated or see things that are not there. Dementia can also be caused by Alzheimer's disease or stroke, or may be a side effect of certain types of medications.
Cardiovascular Symptoms
Calcium is required by the heart to pump efficiently. It helps to control your body's heartbeat. Insufficient levels of calcium can cause cardiac arrhythmia's, or an irregular heartbeat. Symptoms of an irregular heartbeat can include feeling your heart skipping a beat or racing quickly and then slowing down. Dizziness, fatigue and lightheadedness may also occur. Your physician can perform an EKG test to determine if you are experiencing an irregular heartbeat.


