Symptoms
Which endometriosis symptoms mean I should go to the ER?
The short answer
Go to the ER for sudden severe pelvic or belly pain different from usual, or pain with fainting, fever, repeated vomiting or a rigid/swollen belly. Heavy bleeding soaking pads rapidly, pregnancy concerns with pelvic pain or bleeding, chest pain, shortness of breath or coughing blood also need ER care.
Medically reviewed by Dr. Steven Vasilev MD
Advanced Endometriosis Minimally-Invasive Robotic Excision Surgeon, Director of Lotus Endometriosis Institute · Updated Oct 2026
Endometriosis can cause intense pain, but certain symptoms are not something to “wait out.” Go to the ER if you have sudden, severe pelvic or abdominal pain that’s different from your usual pattern (especially if it’s one-sided), pain with fainting, or pain plus fever/chills, repeated vomiting, or a rigid/distended abdomen. Those combinations can signal emergencies like ovarian torsion, a ruptured cyst, appendicitis, infection, or other acute abdominal problems that can look like an endometriosis flare but require urgent evaluation.
Also seek emergency care for heavy bleeding that’s soaking through pads/tampons rapidly, passing large clots with dizziness or weakness, or any concern for pregnancy with pelvic pain or bleeding (including the possibility of ectopic pregnancy). If you develop chest pain, shortness of breath, or coughing up blood, especially if symptoms cycle with your period, treat that as an emergency as well. After the urgent issue is addressed, our team can help you step back and evaluate the bigger picture: why the symptoms are happening, whether endometriosis/adenomyosis or another overlapping condition is driving them, and what a clear plan toward durable relief could look like. Reach out when you’re ready.
Where to go from here
Understand it, compare it with what you're feeling, then talk it through with us.
Step 3 · Speak with Us
Don’t wait out severe pain
If your pelvic or abdominal pain is sudden, different than usual, or comes with fainting, fever/chills, vomiting, a rigid belly, or heavy bleeding, get emergency care now. After you’re safe, our endometriosis and adenomyosis specialists can help identify the cause and build a plan to prevent future,
Questions people ask next
All symptoms questionsWhat red flags are more urgent than endometriosis?
Sudden, severe pain with fever, repeated vomiting, fainting, a rigid abdomen or heavy bleeding is a red flag for something more urgent than endometriosis. Pelvic pain with a positive pregnancy test, chest pain, trouble breathing or a painful swollen leg are also urgent.
Can an endometrioma rupture?
Yes, an ovarian endometrioma can rupture, although it’s not the most common course. Its contents can spill into the pelvis and cause sudden, severe pain and irritation, which needs prompt evaluation because other urgent problems can feel similar.
What does an endometriosis flare feel like?
An endometriosis flare typically feels like a noticeable spike in pain, such as deep pelvic cramping, pressure or sharp, stabbing pains. It may also include bloating, low back or leg pain, painful bowel movements or urination, fatigue and nausea.
Should I see an endometriosis specialist for heavy bleeding?
An endometriosis specialist can help evaluate heavy bleeding, especially when it comes with pelvic pain, severe cramps, pain with sex, or bowel or bladder symptoms. This pattern raises the possibility of endometriosis or adenomyosis, which can overlap.
Further reading
What Else Could It Be? Ruling Out Other Causes
Explore essential insights on endometriosis and other causes of pelvic pain. Learn about differential diagnoses and effective treatment options.
When “Appendicitis” Is Endometriosis in Disguise
Right-sided pain that mimics appendicitis may be appendix endometriosis. Symptoms, why scans miss it, how it’s diagnosed, treatment options, and red flags.
Thoracic Endometriosis: Understanding Symptoms, Diagnosis, and Treatment Options
Chest pain or shortness of breath during your period? Thoracic Endometriosis Syndrome is a rare but serious condition often missed for years. Learn the signs.
