Sunspots Sunspots are dark areas that appear on the surface of the Sun. They are caused by strong magnetic activity within the Sun. Sunspots are not permanent and they can move slowly across the surface of Sun changing size as they move. The appearance of sunspots follows the solar cycle of eleven years. Every eleven years there will be a period of increased sunspot activity.
A heart palpitation is an abnormal beating of the heart AND your heightened awareness of your heart beat. Palpitations can cause your heart to beat fast (tachycardia), slow (bradycardia), flutter, or to even have âskippedâ heart beats (PVCs). Heart palpitations can be caused by electrolyte imbalances, adrenaline, anemia, heart disease, arrhythmias, hypoglycemia (low blood sugar), and of course, anxiety disorders. There are more causes, but the ones listed are common.
Causes of a temporary rapid pulse include anxiety, fever, stress and exercise. Tachycardia causes a prolonged, sustained elevated heart rate, and it may cause your heart rate to increase to 400 beats per minute, notes the Heart Rhythm Society.