
Hyperbaric Oxygen Treatment for Endometriosis
Can hyperbaric oxygen help in endometriosis? Mechanisms, evidence, and when HBOT may fit as adjunct care.

Hyperbaric Oxygen Therapy and Endometriosis: A Reframed Overview
Hyperbaric oxygen therapy (HBOT) is being investigated as a biologically targeted adjunct for endometriosis based on its ability to directly modify tissue oxygen tension—an upstream driver of inflammatory signaling, angiogenesis, and lesion persistence. Rather than acting on hormones or pain pathways alone, HBOT addresses the hypoxic microenvironment that enables endometriotic tissue to survive and propagate, positioning oxygen modulation as a distinct and mechanistically novel therapeutic avenue.
Understanding Hyperbaric Oxygen Therapy
Hyperbaric oxygen therapy entails breathing 100% oxygen in a pressurized chamber at levels above atmospheric pressure. In this environment, oxygen dissolves more effectively into the bloodstream and tissues, leading to a significant rise in tissue oxygenation. HBOT has long-standing applications in wound healing, radiation injury, decompression sickness, and chronic infections.
Oxygen and Endometriosis Biology
Endometriosis lesions frequently inhabit hypoxic, or low-oxygen, microenvironments that drive inflammation, angiogenesis, fibrosis, and pain signaling. Within endometriotic tissue, hypoxia-inducible factors (HIFs) are upregulated and support lesion survival and progression. By elevating tissue oxygen levels, HBOT may help counteract these hypoxia-driven pathways.
How HBOT Might Influence Disease Processes
Research indicates several potential benefits of HBOT in the context of endometriosis. It may reduce both local and systemic inflammation, downregulate hypoxia-inducible factors, inhibit angiogenesis within lesions, improve mitochondrial function alongside cellular repair, and enhance immune modulation. In animal models, exposure to hyperbaric oxygen has been shown to decrease the size and activity of endometriotic implants and to lower inflammatory cytokine levels.
Explore Hyperbaric Oxygen for Relief
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Early clinical observations and limited studies suggest that HBOT may alleviate pelvic pain and improve symptoms in individuals with endometriosis. Some reports describe diminished lesion vascularity and reductions in inflammatory markers following treatment. Despite these encouraging signals, large-scale randomized controlled trials in humans remain limited, and HBOT is not regarded as a standalone therapy.
Integrating HBOT Into a Treatment Plan
- HBOT functions best as a complementary therapy rather than a substitute for excision surgery or medical management.
- It may be considered for select patients within an integrative plan, particularly when persistent inflammation, impaired healing, or complex pain syndromes are present.
- Treatment protocols vary, but they typically comprise multiple sessions delivered over several weeks.
- Administration should occur in accredited medical facilities under physician supervision.
Safety Profile and Treatment Screening
- Potential risks include ear or sinus barotrauma.
- Temporary vision changes can occur.
- Oxygen toxicity is a concern with prolonged exposure.
- Claustrophobia may affect tolerance.
- Patients should undergo careful screening before starting treatment.
Key Points
Hyperbaric oxygen therapy offers a promising adjunctive option for targeting hypoxia-driven inflammation and tissue dysfunction in endometriosis. While preliminary findings are encouraging, additional clinical research is needed to refine protocols, identify ideal candidates, and clarify long-term outcomes. When thoughtfully integrated into care, HBOT may aid healing and symptom relief for select patients.
References
Becker CM, et al. Hypoxia and endometriosis. Hum Reprod Update. 2011;17(6):771–783. DOI: 10.1007/s43032-025-02024-0
Wu MH, et al. Hypoxia promotes the survival of endometriotic cells. Am J Pathol. 2007;170(1):272–284. PMID: 26914112
Erdem M, et al. Effects of hyperbaric oxygen therapy on endometriosis in an experimental rat model. Fertil Steril. 2013;99(3):864–870.
Thom SR. Hyperbaric oxygen therapy. J Intensive Care Med. 2011;26(3):131–145. DOI: 10.1371/journal.pone.0339455
Quick Answers
How rare is endosalpingiosis?
Endosalpingiosis is generally considered uncommon, but “how rare” it is depends heavily on who’s being studied and how it’s found. Many cases are discovered incidentally on pathology—meaning tissue is identified under the microscope after surgery done for other reasons—so it’s likely underrecognized in the general population. In other settings (like surgical cohorts), it may appear more often simply because more tissue is being sampled and examined carefully.
What matters most for patients is that endosalpingiosis can be confused with endometriosis on imaging or even at surgery, yet it doesn’t always behave the same way clinically. If you’ve been told you have endosalpingiosis and you also have pelvic pain, bowel/bladder symptoms, or fertility concerns, our team can help interpret what that finding means in the context of your symptoms and operative/pathology reports. You’re welcome to explore our educational content on related endometriosis and uterine conditions, and reach out to schedule a consultation if you want a personalized plan.
How does estrogen affect the endometrium?
Estrogen is one of the main hormones that drives endometrial growth. In the first half of the menstrual cycle, rising estrogen signals the endometrium to thicken and rebuild after a period, preparing the uterus for a possible pregnancy. It also influences the local immune and inflammatory environment in the uterus, which is part of why hormonal shifts can change bleeding patterns and pain.
When estrogen’s growth signals are strong—and progesterone’s “calming” effect is weaker than expected (often described as progesterone resistance)—the endometrium can behave in a more persistently inflamed, reactive way. This hormone–inflammation pattern is especially relevant in estrogen-dependent conditions like adenomyosis and endometriosis, where tissue similar to the endometrium can contribute to ongoing symptoms. If you’re trying to make sense of heavy bleeding, severe cramping, or cycle-linked pelvic pain, our team can help you connect the hormonal biology to what you’re feeling and review next steps for diagnosis and treatment.
What does a frozen uterus mean with endometriosis?
A “frozen uterus” isn’t a separate diagnosis—it’s a descriptive term surgeons use when the uterus is essentially stuck in place because endometriosis-related inflammation has caused dense scarring (adhesions). Instead of the uterus moving freely, it may be tethered to nearby structures like the bowel, bladder, ovaries, or pelvic sidewall, sometimes pulling the uterus into an abnormal position and making pelvic anatomy hard to distinguish.
This finding often suggests more advanced disease, such as deep infiltrating endometriosis and/or significant adhesions from prior inflammation or surgery, and it can help explain symptoms like deep pelvic pain, painful sex, bowel or bladder symptoms, or pain that doesn’t match what a routine exam shows. In these cases, surgery is less about “burning spots” and more about carefully restoring normal anatomy—freeing organs, protecting ureters and bowel, and removing endometriosis at its roots. If you’ve been told your uterus is “frozen,” our team can help you understand what that implies for imaging, surgical planning, and which adjacent organs may need to be evaluated as part of a complete excision strategy.
What are peritoneal pockets in endometriosis?
Peritoneal pockets are small “indentations” or fold-like defects in the peritoneum—the thin lining that covers the pelvic organs and inner abdominal wall. In endometriosis surgery, we may see these pockets as tucked-in areas or little pits in the peritoneal surface, and they can be associated with superficial peritoneal endometriosis or early/developing disease patterns.
These pockets matter because endometriosis doesn’t always look like obvious black or red implants; it can hide within subtle anatomic changes, scarring, or altered peritoneal contours. In the operating room, careful inspection and technique are important so that disease within or around a peritoneal pocket isn’t missed or only treated on the surface. If you’ve been told you have “peritoneal pockets,” our team can help you understand what that finding may mean in your case—based on your symptoms, imaging, and whether deeper structures (like bowel, bladder, or ureters) could also be involved.
How long does endo belly (bloating) usually last?
“Endo belly” can last anywhere from a few hours to several days, and for some people it can linger longer or feel nearly constant during certain parts of the month. The duration often depends on what’s driving it for you—hormone-linked inflammation around ovulation or a period, bowel slowing/constipation, pelvic adhesions restricting organ movement, or a combination. Many patients notice it waxes and wanes, sometimes changing noticeably within the same day.
If your bloating is predictable and cyclical, that pattern can be a clue that endometriosis or adenomyosis-related inflammation is playing a major role—even when imaging looks “normal.” If it’s frequent, severe, or paired with bowel or bladder symptoms (pain with bowel movements, urinary urgency, rectal pressure), it can also suggest deeper pelvic disease or significant inflammation affecting nearby organs. Our team can help you sort out whether your “endo belly” is primarily hormonal, GI-driven, or related to pelvic disease that may benefit from targeted treatment, including excision when appropriate—reach out to schedule a consultation and we’ll map your symptoms to a clear plan.

