Conditions list medically reviewed by George Krucik, MD, MBA
A head injury is an injury to your brain, skull, or scalp. All head injuries should be treated seriously and assessed by a doctor. Get the facts about 6 major types.
Delirium is an abrupt change in the brain that causes mental confusion and emotional disruption. It makes it difficult to think, remember, sleep, pay attention, and more…
Concussions can cause serious symptoms that require medical treatment. A concussion is a traumatic brain injury that results in an altered mental state.
Meningitis can affect you differently depending on your age. Learn more about the symptoms and risk factors for each age group.
Encephalitis is inflammation of the brain tissue. It's most often caused by viral infections. In some cases, bacterial infections can also cause encephalitis.
Low blood sodium, or hyponatremia, occurs when water and sodium are out of balance in your body. It can cause weakness, headache, nausea, and muscle cramps.
Sleep disorders are a group of conditions that affect the ability to sleep well on a regular basis. Learn about sleep disorder symptoms, types, and treatment.
Learn about migraine types, symptoms, triggers, and treatments as well as how they are different from regular headaches.
Hypercalcemia is a condition in which you have too much calcium in your blood.
Nicotine addiction occurs when a person becomes addicted to nicotine, which is a chemical found in tobacco. The addiction is physical, mental, and behavioral.
Insomnia is a sleep disorder. Individuals who suffer from insomnia find it difficult to fall asleep, stay asleep, or both. They don't feel refreshed when they wake up…
Central sleep apnea is a sleep disorder in which you briefly stop breathing during sleep.
Shaken baby syndrome is caused by forcefully and violently shaking a baby. Learn about shaken baby syndrome symptoms, diagnosis, and treatment.
There are many types of skull fractures, but only one major cause. Get the facts on fractures and learn about diagnosis and treatment.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.