Conditions list medically reviewed by George Krucik, MD, MBA
Hypoglycemia, or low blood sugar, is a potentially dangerous condition that's most common in people with diabetes. Learn what causes it and how to prevent it.
High blood pressure is often associated with few or no symptoms. Many people have it for years without knowing it.
People with paroxysmal supraventricular tachycardia experience a faster-than-normal heart rate. Learn more about the symptoms, treatments, and outlook.
Atrial fibrillation and flutter are irregular heart rhythms that occur when the upper chambers of the heart beat irregularly or too fast. Fibrillation can be sustained…
A stroke is a medical emergency that requires immediate medical care. Learn about the signs of a stroke and what to do.
During a heart attack, the blood supply that normally nourishes the heart with oxygen is cut off and the heart muscle begins to die. Learn more.
Dehydration takes place when your body loses more fluid than you drink. The most common cause of water loss from the body is excessive sweating.
Panic disorder occurs when you live in fear of a panic attack. You may be having a panic attack when you feel sudden, overwhelming terror with no obvious cause.
Hypovolemic shock (hemorrhagic shock) is a life-threatening condition that results when you lose more than 20 percent of your body's blood or fluid supply, preventing…
A drug allergy is an allergic reaction to a medication. Find out how to know if you have one and what to do about it.
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.
A pulmonary embolism is a blood clot that occurs in the lungs. It can damage part of the lung and other organs and decrease oxygen levels in the blood.
The aorta carries blood from your heart to your abdomen, legs, and pelvis. When the abdominal aortic walls are swollen, it's known as abdominal aortic aneurysm.
Anorexia nervosa is an eating disorder that can result in severe weight loss. Learn more about warning signs and treatment.
Many marine animals bite or sting. Some animals are venomous, while others can inflict deep bites. Learn more about the risks and prevention.
Learn about carbon monoxide poisoning and what causes it. Find information on carbon monoxide symptoms, diagnosis, treatment, and prevention.
Toxic megacolon is a rare, life-threatening widening of the large intestine and is usually a complication of inflammatory bowel disease (IBD).
A bite from a venomous snake should always be treated as a medical emergency. Even a bite from a harmless snake can lead to an allergic reaction or infection.
Acute mountain sickness is a condition that occurs when your body can't adjust to a high level of altitude. Learn more about the signs and how to treat it.
Damage to the nerves that help your organs to function can cause a condition called autonomic neuropathy (AN) and is associated with other conditions.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.