For many people, this is around 98.6☏ (37☌). Your heart rate can increase as a result of your body working harder to maintain its normal temperature. This includes expanding and constricting your skin’s blood vessels to help keep heat in or carry it to your skin’s surface, causing muscle contractions and shivering. Your body reacts to a change in temperature by triggering processes to try to regulate your body temperature. Cold or feverĪny drastic change in your body temperature can cause changes in your heart rate. If you wake up after an upsetting dream or night terror with your heart racing, your heart rate should slow as you calm down. Night terrors are a type of sleep disorder in which a person awakens partially in a state of terror. Nightmares are disturbing dreams that can wake you up. Nightmares and night terrors can cause you to wake up with a racing heart. Other symptoms of low blood sugar include: Going a long time without eating can cause low blood sugar as well as certain conditions, like:

Rapid heart rate is just one of the possible effects of low blood sugar on your body. attention deficit hyperactivity disorder (ADHD) drugs.OTC cough and cold medications that contain pseudoephedrine, such as Sudafed.thyroid medication, such as levothyroxine.Certain over-the-counter (OTC) and prescription medications can include such stimulants. Just like caffeine, other stimulants can cause your heart to race. tingling or numbness in the hands and feet.In 2015, researchers also discovered that a rapid heart rate increases the risk of diabetes. Other side effects of too much caffeine include:ĭiabetes causes high blood glucose levels, which can damage the walls of your arteries and cause a rapid heart rate, high blood pressure, and other heart-related complications. In some people, too much caffeine can increase heart rate and blood pressure and cause anxiety and nervousness.Ĭonsuming a large amount of products containing caffeine, such as coffee, tea, soda, and energy drinks can cause your heart to race. It stimulates your brain and central nervous system, which increases alertness. The sudden drops in your blood oxygen levels raise your blood pressure and strain your cardiovascular system.Ĭaffeine is a natural stimulant commonly found in coffee, tea, and cacao plants. Research shows that sleep apnea increases the risk of irregular heart rate. It occurs when your throat muscles relax, causing your airway to narrow or close. Obstructive sleep apnea is the most common type. Sleep apnea is a sleep disorder in which breathing repeatedly stops and starts. If you have AFib, you may also experience: In some cases, it can increase the risk of heart failure and may require treatment. AFib itself isn’t usually life-threatening. It happens when the heart’s upper chambers beat out of coordination with the lower chambers.ĪFib usually causes a fast heart rate, but some people feel a fluttering or thumping in the chest. Atrial fibrillationĪtrial fibrillation (AFib) is the most common type of irregular heartbeat. Refined carbohydrates, such as white bread or pasta, can have the same effect, especially in people with diabetes. Some people also get what’s known as a “ sugar headache.” Along with a racing heart, you may also begin to sweat. The increase in blood sugar and energy is interpreted by your body as stress, which triggers the release of stress hormones. This signals your pancreas to release insulin and convert what it can to energy. Having too much sugar can cause a blood sugar spike. The sugar you consume is absorbed into your bloodstream after passing through your small intestine. These symptoms should clear up as your hangover subsides. You may also have other symptoms, such as a headache, muscle aches, nausea, and dizziness. A recent study confirmed that binge drinking and long-term heavy alcohol use are associated with different types of cardiac arrhythmia, especially sinus tachycardia. The more you drink, the faster your heart beats. If you’re waking up with your heart racing after drinking, chances are you’ve had too much.ĭrinking alcohol increases your heart rate. Other common symptoms of anxiety include: If you have depression or anxiety, or are under a lot of stress, you may wake up with a racing heart from time to time. The more anxious you feel, the more pronounced your symptoms can be. Stress and anxiety trigger the release of stress hormones, which in turn increase your heart rate and blood pressure. Here’s a look at some common ones and other symptoms to watch out for. There are many possible causes of a fast heart rate in the morning.

Racing heartbeat