Your heart rate can increase when your body works harder to keep its typical temperature. These mechanisms help keep heat in or carry it to the skin’s surface, causing muscle contractions and shivering. This includes expanding and constricting your skin’s blood vessels. Your body reacts to a change in temperature by triggering processes to try to regulate your body temperature. This includes cold temperatures and having a fever. 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 more commonly affect young children. 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: Certain health conditions can also cause low blood sugar levels. Going a long time without eating can cause low blood sugar. Rapid heart rate can be a possible effect of low blood sugar, according to older 2014 research. attention deficit hyperactivity disorder drugs.OTC cough and cold medications that contain pseudoephedrine such as Sudafed.thyroid medication such as levothyroxine.Stimulants may be ingredients in certain over-the-counter (OTC) and prescription medications. Just like caffeine, other stimulants can cause your heart to race. tingling or numbness in the hands and feet.Research from 2019 suggests that having a rapid heart rate increases the risk of type 2 diabetes. These may include:ĭiabetes causes high blood glucose levels, which can damage the walls of your arteries and cause rapid heart rate, high blood pressure, and other heart-related complications. This includes products such as:ĭrinking too much caffeine can cause other side effects. In some people, too much caffeine can increase heart rate and blood pressure and cause anxiety and nervousness.Ĭonsuming a large amount of caffeine-containing products can cause your heart to race. It stimulates the brain and central nervous system, which increases alertness. Sudden drops in your blood oxygen levels can raise your blood pressure and strain the cardiovascular system.Ĭaffeine is a natural stimulant commonly found in coffee, tea, and cacao plants. Research from 2018 suggests that sleep apnea increases the risk of an 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 while you are asleep. If you have AFib, you may also experience: But in some cases, it can increase the risk of heart failure and may require treatment. 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.ĪFib itself isn’t usually life threatening. Atrial fibrillationĪtrial fibrillation (AFib) is the most common type of irregular heart rate. 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.” This triggers the release of stress hormones.Īlong with a racing heart, you may also begin to sweat. Your body may interpret an increase in blood sugar and energy as stress. 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 have other symptoms of a hangover hours after drinking. A 2017 study linked binge drinking and long-term heavy alcohol use 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 can 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. A higher level of anxiety may cause more intense symptoms. These hormones, in turn, can increase your heart rate and blood pressure. Stress and anxiety trigger the release of stress hormones. Here’s a look at some common ones and other symptoms to watch out for. Having a fast heart rate in the morning can have many causes.
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