Hyperbaric oxygen therapy (HBOT) is used to treat many conditions from severe burns to carbon monoxide poisoning. But like all medical procedures, it has some risks. Here's what you need to know about.

Pressure injuries are sores that happen on areas of the skin that are under pressure. The pressure can come from lying in bed, sitting in a wheelchair, or wearing a cast for a long time.

A detailed look at dyssomnia sleep disorders. These sleep disorders are caused by another health problem.

A mild concussion is caused by a blow or jolt to the head.

How and when you feel sleepy has to do with your sleep/wake cycles. These cycles are set off by chemicals in the brain.

One way that scientists measure sleep is through brain waves, which change in specific ways as you move through the sleep process. Your brain waves change during four basic stages of sleep.

Dizziness and a spinning sensation (vertigo) are classic symptoms of a vestibular balance disorder. These disorders can strike at any age. But they are most common as you get older.

Herpes meningoencephalitis is an infection of the brain and the tissue that covers it with the herpes simplex virus.

Chikungunya is caused by a virus carried by mosquitoes. The disease was first found in Africa and Asia, but recent outbreaks have been in the Caribbean and Central and South America.

Lambert-Eaton syndrome is an autoimmune disorder affecting the areas where nerves and muscles connect. It causes weak muscles, trouble walking, and other symptoms.