Endometriosis can cause pelvic pain, especially around periods, but fever is not a typical symptom. If pelvic pain occurs with a raised temperature, another problem—such as a pelvic infection—needs to be considered, even if you already have endometriosis. Seek prompt medical assessment, and get emergency care for sudden or severe pain, fainting, or possible pregnancy with pain or bleeding.
Does endometriosis usually cause fever?
Endometriosis is a condition in which tissue similar to the lining of the uterus grows outside the uterus. It can affect the ovaries, fallopian tubes, and other tissues in the pelvis. This tissue responds to hormonal changes during the menstrual cycle and can cause irritation, inflammation, and pain.
According to Mayo Clinic, common symptoms include pelvic pain, painful menstrual periods, pain during sexual intercourse, and discomfort during bowel movements or urination. Some people also experience fatigue, bloating, or nausea, particularly around their periods. Fever is not a typical symptom in the usual description of endometriosis.
Having pelvic pain and a fever does not automatically rule out endometriosis. Someone with endometriosis can also develop an infection or another medical condition. However, it is important not to assume that endometriosis explains the fever. The combination of symptoms deserves medical assessment, particularly if the pain is new, worsening, or different from your usual menstrual pain.
What does endometriosis-related pelvic pain typically feel like?
Endometriosis-related pain often follows a pattern linked to the menstrual cycle, although it can also occur outside the period. The location and intensity of pain vary, and symptoms do not always follow the same pattern from one person to another.
Examples of symptoms that may occur with endometriosis include:
- Painful menstrual cramps that interfere with everyday activities.
- Pelvic or lower abdominal pain before, during, or after a period.
- Pain during or after sexual intercourse.
- Pain when passing stool or urine, particularly around menstruation.
- Heavy menstrual bleeding or difficulty becoming pregnant.
These symptoms can help a healthcare professional understand whether endometriosis might be contributing to pelvic pain, but they cannot establish the cause on their own. A familiar pattern of period-related pain may support further evaluation for endometriosis, while a new fever is a reason to look for additional explanations.
What else can cause fever with pelvic pain?
Fever can occur when the body responds to an infection or another inflammatory process. Several conditions can cause pelvic or lower abdominal pain alongside an elevated temperature. Some require prompt treatment, so identifying the source matters more than trying to match the symptoms to one condition.
Pelvic inflammatory disease
Pelvic inflammatory disease (PID) is an infection involving the upper female reproductive tract, including the uterus, fallopian tubes, and sometimes the ovaries. It can cause lower abdominal pain, fever, unusual vaginal discharge, bleeding between periods, or pain during sex. Some people have mild symptoms or no noticeable symptoms at all.
The Centers for Disease Control and Prevention (CDC) identifies lower abdominal pain, fever, and unusual vaginal discharge as possible symptoms of PID. The condition may be associated with sexually transmitted infections, although not every case has the same cause. Timely assessment and treatment are important because untreated PID can lead to complications, including persistent pelvic pain, scarring, and fertility problems.
Other pelvic or abdominal infections
A urinary tract infection may cause lower abdominal discomfort, pain during urination, or a frequent need to urinate. If an infection affects the kidneys, fever and pain in the back or side may also occur. Appendicitis can produce abdominal pain and fever, with the pain often becoming more pronounced as the condition progresses.
These conditions can overlap with symptoms associated with gynecological disorders. The location of the pain, urinary or bowel symptoms, examination findings, and any changes over time help a healthcare professional decide which causes need to be investigated.
Ovarian torsion or a complication involving an ovarian cyst
Ovarian torsion occurs when an ovary twists around the tissues that support it, potentially reducing its blood supply. It commonly causes sudden, significant lower abdominal or pelvic pain and may also cause nausea and vomiting. Fever can develop in some cases when the affected tissue is damaged.
Cleveland Clinic describes ovarian torsion as a medical emergency because delayed treatment can threaten the affected ovary. Sudden or severe pelvic pain, especially with vomiting or fever, should therefore be assessed immediately rather than attributed to endometriosis.
Ectopic pregnancy
An ectopic pregnancy occurs when a fertilized egg implants outside the uterus, most often in a fallopian tube. It may cause pain low in the abdomen, often on one side, and vaginal bleeding. A ruptured ectopic pregnancy can cause internal bleeding and become life-threatening.
According to the NHS, anyone who could be pregnant and develops pelvic or lower abdominal pain should seek prompt medical advice, even without a positive pregnancy test. Sudden, intense pain, dizziness, or fainting requires emergency care. This possibility should be considered regardless of whether endometriosis has previously been diagnosed.
When should you seek medical care for fever and pelvic pain?
Fever occurring with pelvic pain should not be dismissed as a usual feature of endometriosis. Contact a healthcare professional promptly for assessment, particularly when the symptoms are new, persistent, worsening, or accompanied by unusual vaginal discharge, abnormal bleeding, or urinary symptoms.
Seek emergency medical care if you experience any of the following:
- Sudden, severe, or rapidly worsening pelvic or abdominal pain.
- Fainting, marked dizziness, confusion, or unusual weakness.
- Pelvic pain with possible pregnancy, particularly if there is vaginal bleeding or shoulder-tip pain.
- Severe pain accompanied by repeated vomiting or a significant worsening of your overall condition.
Do not wait for every symptom to appear before seeking help. Serious conditions can begin with symptoms that resemble less urgent problems. If you feel very unwell or the pain is intense, seek emergency care rather than waiting for a routine appointment.
How do doctors determine whether endometriosis or another condition is responsible?
The assessment begins with your symptoms and medical history. A healthcare professional may ask when the pain started, where it is located, whether it changes around menstruation, how high your temperature has been, and whether you have experienced unusual bleeding, discharge, nausea, urinary symptoms, or bowel changes.
Depending on the findings, the evaluation may include:
- Physical examination: An examination may help identify tenderness or other signs that suggest an infection or a problem involving the pelvic organs.
- Pregnancy testing: This may be needed when pregnancy is possible, particularly with new pelvic pain or bleeding.
- Urine and blood tests: These may help evaluate infection or other possible causes of the symptoms.
- Testing for sexually transmitted infections: If PID is suspected, a clinician may recommend appropriate testing.
- Imaging: Ultrasound or other imaging may be used to assess the reproductive organs and look for conditions such as ovarian cysts or other causes of pelvic pain.
MedlinePlus explains that evaluating pelvic pain may involve laboratory tests and imaging, depending on the possible cause. The specific tests chosen depend on the symptoms and examination findings rather than on pelvic pain alone.
If endometriosis remains a possibility, your clinician may recommend a gynecological assessment to investigate the pattern of pain and discuss appropriate diagnostic options. Finding another cause of fever does not necessarily mean that endometriosis is absent; more than one condition can contribute to symptoms.
What can you do before your medical appointment?
Keep a simple record of your symptoms while arranging medical assessment. Note your temperature, when the pelvic pain began, where it hurts, whether the pain is constant or intermittent, and how the symptoms relate to your menstrual cycle. Record any unusual discharge, bleeding, urinary discomfort, vomiting, or bowel changes as well.
Bring details of any previous endometriosis diagnosis, pelvic infections, ovarian cysts, recent procedures, medications, and the possibility of pregnancy. This information may help the clinician decide which tests are most appropriate. However, do not delay urgent or emergency care to complete a symptom diary, and do not rely on home care alone when fever and pelvic pain occur together.
The key point: Endometriosis is a possible explanation for recurring pelvic pain, especially when symptoms follow a menstrual pattern. Fever is not a typical feature, so it is important to investigate other possible causes, including infection and urgent pelvic conditions. Prompt assessment can help identify the problem and guide appropriate treatment.