What it is
An intracranial abscess is a pocket of infection inside the skull — in or around the brain. Even with surgery and IV antibiotics, these are dangerous, and some patients can't undergo full surgical drainage.
How hyperbaric oxygen helps
Abscess cores are oxygen-poor, which protects the bacteria (often anaerobes) and weakens infection-fighting white cells. HBOT floods the area with oxygen: hostile to the organisms, fuel for the immune response, and a boost to several antibiotics' effectiveness. It also helps reduce brain swelling.
What treatment looks like
Typically 10–20 sessions at 2.0–2.5 ATA alongside neurosurgical care and antibiotics, particularly for multiple abscesses, deep locations, or patients who are poor surgical candidates.
- Always adjunctive — coordinated with neurosurgery and infectious disease.
- FDA-recognized indication.
The evidence, honestly
Grade B — Good Evidence
Meaningful clinical studies support benefit; more trials would strengthen certainty.
Our structured research library — with every study linked from this page — arrives with the next site update. Ask us for the citations any time in the meantime.
Common questions
Who is this for?
Mainly patients whose abscesses are multiple, deep, or hard to drain surgically, or where standard treatment isn't controlling the infection. Your neurosurgical team and our physicians decide together.
Educational content, not medical advice — see our medical disclaimer. *Medicare coverage requires meeting clinical criteria; we verify yours for free. Last medically reviewed July 2026 by Dr. David Greene, MD.