Fever, Rapid heartbeat: 21 Possible Causes
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What causes fever and rapid heartbeat? 21 possible conditions

See a list of possible causes in order from the most common to the least.

1

Sepsis

This condition is considered a medical emergency. Urgent care may be required.

One life-threatening complication of infection is sepsis, which often occurs in people who are elderly or have weak immune systems. Patches of discolored skin is a symptom of severe sepsis.

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2

Caffeine Overdose

The recommended amount of caffeine is usually 400 mg per day for healthy adults. Caffeine overdose may occur if you ingest more than this amount.

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3

Septic Shock

This condition is considered a medical emergency. Urgent care may be required.

Septic shock is a complication of an infection in which toxins can initiate a full-body inflammatory response and organ failure. Confusion, breathing problems, chills, and cold sweats.

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4

Alcoholic Liver Disease

Damage to the liver from excessive drinking can lead to ALD. Years of alcohol abuse cause the liver to become inflamed and swollen. This damage can also cause scarring known as cirrhosis. Cirrhosis is the final stage o...

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5

Infectious Mononucleosis

Infectious mononucleosis, or mono, refers to a group of symptoms usually caused by the Epstein-Barr virus (EBV).

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6

Adrenergic Bronchodilators Overdose

This condition is considered a medical emergency. Urgent care may be required.

An adrenergic bronchodilators overdose is when you take too much of a certain kind of asthma medication.

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7

Thyroid Storm

This condition is considered a medical emergency. Urgent care may be required.

Thyroid storm is a life-threatening condition that results from undertreated or untreated hyperthyroidism. Persistent sweating is one possible sign of thyroid storm.

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8

Sickle Cell Anemia

Red blood cells are normally shaped like discs, which allows them to travel through blood vessels. Sickle cell disease causes sickle cells to be sickle-shaped.

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9

Acute Pancreatitis

Acute pancreatitis is an inflammation in the pancreas, which causes pain and swelling in the upper left side of the abdomen, nausea, and burping.

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10

Amphetamine Dependence

Amphetamines are a type of stimulant and can be highly addictive. Consistent amphetamine dependence can lead to overdose, brain damage, and even death.

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11

Toxic Megacolon

This condition is considered a medical emergency. Urgent care may be required.

Toxic megacolon is a rare, life-threatening widening of the large intestine and is usually a complication of inflammatory bowel disease (IBD).

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12

Getting a Handle on Aspiration Pneumonia

This condition is considered a medical emergency. Urgent care may be required.

Aspiration pneumonia is an inflammation (usually due to an infection) of your lungs and bronchial tubes that occurs after you inhale foreign matter.

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13

Hernia

A hernia occurs when an organ pushes through an opening in the muscle or tissue that holds it in place. For example, the intestines may break through a weakened area in the abdominal wall. Hernias are most common in th...

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14

Alcohol Withdrawal Syndrome

This condition is considered a medical emergency. Urgent care may be required.

Alcohol withdrawal syndrome (AWS) is the name for the symptoms that occur when a heavy drinker suddenly stops or significantly reduces their alcohol intake. With AWS, you may feel mild anxiety and fatigue. You may als...

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15

Snake Bites

This condition is considered a medical emergency. Urgent care may be required.

A venomous snake bite can be deadly and is a medical emergency. Even a bite from a harmless snake can cause infection or an allergic reaction, producing symptoms like pain and swelling, convulsions, nausea, or paralysis.

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16

Addisonian Crisis (Acute Adrenal Crisis)

This condition is considered a medical emergency. Urgent care may be required.

An Addisonian crisis occurs when levels of cortisol suddenly drop. Learn more about an Addisonian crisis, including symptoms, risk factors, and treatment.

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17

Preeclampsia

Preeclampsia occurs when you're pregnant and you have high blood pressure and protein in your urine. It can be dangerous for both you and your baby.

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18

Pulmonary Fibrosis

Pulmonary fibrosis is a condition that causes lung scarring and stiffness. This keeps the body from getting enough oxygen.

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19

Myocarditis

Myocarditis is inflammation of the heart muscle. It is a rare condition that can be caused by any number of autoimmune diseases, viral, bacterial, or fungal infections, or parasites. When you have an infection or a...

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20

All About Autonomic Dysrelexia (or Hyperreflexia)

Autonomic dysreflexia (AD) is a condition in which your involuntary nervous system overreacts to stimuli. It's also known as autonomic hyperreflexia.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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