In-depth

Symptoms

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Nausea and vomiting

Sick to your stomach? Nausea and vomiting usually pass quickly but sometimes result from long-term or serious conditions.

Treatments and drugs

Hyperbaric oxygen therapy

Hyperbaric oxygen therapy, a procedure used to increase blood oxygen levels, can help wounds heal, fight infection and treat decompression sickness.

Feb. 21, 2012