In-depth

Symptoms

Headache

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

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

You Are ... The Campaign for Mayo Clinic

Mayo Clinic is a not-for-profit organization. Make a difference today.