20 Symptoms of Endometriosis

Endometriosis is a chronic, often painful condition where tissue similar to the lining of your uterus grows outside of it. It may be hard to imagine so many women living with endometriosis, but it's a reality for millions around the world. Globally, about 10% of women of reproductive age (around 190 million) have endometriosis. 

Endometriosis symptoms vary a lot from person to person and don't always match how severe the disease is. For example, someone with only a few small lesions might experience intense pain, while someone with extensive tissue growth may feel nothing. Recognizing the symptoms can help you listen to your body, seek support, and take an active role in your health, helping you find relief.

This article offers a clear, compassionate, and science-backed overview of endometriosis. It provides a deeper understanding of the condition, how it affects your overall health, why diagnosis can be difficult, and the wide range of symptoms you may experience. As living with endometriosis can present unique challenges, it's important to know that there are many ways to find relief and improve your quality of life.

What Are the First Signs of Endometriosis?

The earliest signs of endometriosis are often subtle and easily mistaken for standard menstrual discomfort. However, clinical practice and research, made by the French Lille University show that endometriosis pain tends to be more intense, highly cyclical, and progressively worsens over time.

The most common early warning markers include:

• Period pain that interferes with daily life, school, or work

• Pain starts days before bleeding actually begins

• Painful bowel movements strictly during menstruation

• Severe abdominal bloating (often called "endo belly")

• Painful intercourse early in one's sexual life

• Profound fatigue centered around the menstrual cycle

• Heavy or irregular bleeding early on in the reproductive years

Because these early signs often follow hormonal patterns or cycle irregularities, tracking your cycle is a powerful first step in advocating for your health. The Hormone Monitor, Wands and Mira App help identify and track subtle hormonal changes by analyzing data on hormone levels in urine, including luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol metabolite (E3G), and progesterone metabolite (PdG). Sharing hormone and metabolite levels in urine with your healthcare provider can help you get off to the right start. 

Also, incorporating tools like a basal body thermometer is wonderful for tracking your reproductive health. Mira’s Basal Body Thermometer helps monitor fertility signs, including ovulatory patterns, hormonal changes, and early pregnancy indicators. 

These tools can help women gain a deeper understanding of their menstrual cycles.

What Does Endometriosis Feel Like?

When patients describe what endometriosis feels like, they rarely just say "cramps." The sensory experience often includes descriptions like "stabbing," "burning," "deep ache," "hot poker," "pulling," or "heavy pressure." 

The sensations can vary significantly from person to person. It might include sharp, stabbing pain, a constant dull ache, and a feeling of pressure in the pelvic region, often worsening during menstruation. This intense sensation occurs because endometriosis lesions can involve nerves, trigger pelvic floor muscle spasms, and release chemicals that cause a massive inflammatory response.

Describing your specific pain experience to your healthcare provider is crucial for diagnosis and management. Often this pain can:

• Radiate to the lower back, legs, and hips

• Feel highly cyclical, matching the rise and fall of your hormones

• Intensify sharply with physical movement, sex, bowel movements, or urination

• Trigger systemic reactions like nausea, vomiting, or overwhelming fatigue

Note: It cannot be stressed enough that pain severity does not reflect disease severity. You can have severe disease with mild pain, or mild disease with agonizing pain.

20 Symptoms of Endometriosis

Diagnosing endometriosis can sometimes be a complex process for healthcare providers. While endometriosis has recognized symptoms, these can sometimes be mistaken for other gynecological, digestive, or urinary issues. 

Symptoms are often worse during menstruation, but can become constant. Below is the full list of endometriosis symptoms, detailing how this condition can impact the entire body.

1. Painful Periods (Dysmenorrhea)

Severe menstrual cramps unrelieved by over-the-counter medicine are a key sign. Misplaced tissue bleeds and sheds like the uterine lining but has nowhere to exit, causing trapped inflammation. This leads to intense pain that may start days before your period and last through menstruation, sometimes radiating to your back and legs.

2. Chronic Pelvic Pain

Defined as pelvic pain lasting six months or more, this condition occurs when repeated inflammation causes scar tissue (adhesions) and ongoing pelvic floor muscle spasms. Some people experience persistent lower abdominal and pelvic pain that may continue even outside of menstruation.

3. Pain During Intercourse (Dyspareunia)

Discomfort or pain experienced during or after sexual intercourse. Deep penetration can stretch or pull endometriosis adhesions located behind the vagina and lower uterus, causing sharp or deep aching pain.

4. Pain After Intercourse or Pelvic Pain Flares

Inflamed pelvic nerves and muscles used during sex can spasm afterward, leading to lingering pelvic pain that lasts for hours or days.

5. Abdominal Bloating (“Endo Belly”)

A significant feeling of abdominal expansion and fullness, often called "endo belly.” This severe, uncomfortable bloating is caused by the inflammatory cascade triggered by endometriosis tissue in the abdominal cavity.

6. Abdominal Pain (Random or Cyclical)

Inflammation and adhesions can lead to sharp or pulling abdominal pain that may occur at any point in your menstrual cycle, regardless of your specific phase.

7. Heavy Menstrual Bleeding

Endometriosis can alter hormonal balances and frequently co-occurs with adenomyosis, leading to abnormally heavy periods (soaking through a pad/tampon every hour).

8. Irregular Spotting or Bleeding Between Cycles

Hormonal disruptions related to the disease can cause random spotting or bleeding outside your normal menstrual window.

9. Painful Bowel Movements (Dyschezia)

If lesions grow on or near the bowel or rectum, passing a bowel movement, especially during a period, can be extremely painful.

10. Constipation

Inflammation from endometriosis can cause the pelvic floor muscles to become hypertonic (too tight), making it difficult to relax and pass stool.

11. Diarrhea

Increased prostaglandins (hormone-like substances that cause cramping) and bowel endometriosis inflammation frequently result in diarrhea, especially during a period.

12. Rectal Bleeding During Periods

Deep infiltrating endometriosis (DIE) that has penetrated the bowel or rectum can cause cyclical rectal bleeding.

13. Pain With Urination (Dysuria)

If lesions grow on the bladder or ureters, or if the pelvic floor is in spasm, urination can feel burning or painful, often mimicking a UTI.

14. Urinary Frequency or Urgency

Inflammation around the bladder can make it feel constantly full, leading to frequent trips to the bathroom.

15. Bladder Pressure or Pain (IC-like symptoms)

Endometriosis often mimics or co-occurs with interstitial cystitis (IC), presenting as a heavy pressure or constant ache in the bladder region.

16. Fatigue and Low Energy

Fighting chronic inflammation and enduring severe pain takes a massive toll on the body, leading to chronic exhaustion that sleep doesn't fix.

17. Nausea and Vomiting

Severe pain, hormonal fluctuations, and gastrointestinal involvement can easily trigger intense nausea and vomiting during flare-ups.

18. Lower Back Pain

Because the uterus and pelvic organs share nerve pathways with the lower back, pelvic inflammation often radiates backward, causing a deep, aching lower back pain.

19. Leg Pain (Nerve-Related Pain)

When endometriosis lesions grow near or compress the sciatic nerve or other pelvic nerves, it can send shooting, burning pain down the legs.

20. Fertility Issues or Infertility

Inflammation can damage sperm or eggs, and adhesions can physically block the fallopian tubes, making endometriosis a leading cause of infertility.

Uncommon Symptoms of Endometriosis

While the above covers the standard endometriosis symptoms and signs, the disease can travel far beyond the pelvic cavity. Though less common, these symptoms frequently appear in cases of deep infiltrating endometriosis:

• Rectal fullness: A constant feeling of needing to pass a bowel movement, caused by lesions behind the rectum.

• Painful ovulation: Sharp, distinctive pain midway through the cycle.

• Sciatic pain: Shooting pain down the back of the leg, worsening during a period.

• Shoulder or chest pain: An indicator of diaphragmatic endometriosis, where lesions grow on the diaphragm muscle.

• Shortness of breath: Can occur with thoracic (lung) endometriosis.

• Headaches and migraines: Exacerbated by hormonal imbalances.

• Pain triggered by exercise: Core engagement pulling on internal adhesions.

• Postcoital bleeding: Bleeding after sex, sometimes caused by lesions on the cervix.

• Endometriosis flank pain: Pain in the side of the torso can indicate lesions on the ureters or kidneys.

Because these are uncommon, they frequently lead to misdiagnosis as irritable bowel syndrome (IBS), interstitial cystitis (IC), anxiety, or musculoskeletal disorders. If you suspect that your systemic symptoms are interconnected, it’s important to investigate further.

One valuable tool for this is the Panorama Lab Test, which can help you understand your overall fertility health and ovarian reserve. Testing key hormones such as AMH, TSH, free T4 (fT4), prolactin, free testosterone, total testosterone, SHBG, and albumin provides valuable insight into your reproductive health. This analysis helps pinpoint underlying issues, allowing you to make informed decisions about your fertility.

Go to the lab—without actually going

Test your 5 essential fertility biomarkers & get 5 personalized reports from home.

Try Now

Common Misdiagnoses for Endometriosis

How Long Does Endometriosis Pain Last?

All symptoms of endometriosis can strain the person experiencing them. However, pain is one of the primary features of endometriosis that can manifest in various ways, often influenced by hormonal fluctuations throughout your menstrual cycle.

At first, the pain is usually cyclical, flaring up fiercely during periods and ovulation, and subsiding in between. However, over time, the pain can become chronic and constant. This transition happens due to neuroinflammation (nerves becoming highly sensitized to pain), the formation of rigid adhesions that bind organs together, and chronic pelvic floor muscle dysfunction.

Even with constant pain, patients experience severe endo flare-up symptoms triggered by sex, bowel movements, urination, exercise, sitting for long periods, or high stress. Medically, chronic pelvic pain is defined as pain lasting 6 months or longer.

Cyclical vs. Chronic Endometriosis Pain Patterns

Why Symptoms Are Often Missed or Misdiagnosed

Sometimes, diagnosing endometriosis can be a journey, as its symptoms can overlap with other conditions. This can understandably lead to frustration and delays. The diagnostic delay for endometriosis is notoriously long, averaging 7 to 10 years. This happens largely because the endo signs mimic so many other conditions.

Endometriosis symptoms are frequently misdiagnosed due to various factors, including symptom overlap with other conditions, lack of awareness, and the invasive nature of the diagnostic procedure. For example, endometriosis can present symptoms similar to recurrent UTIs and IC when patients experience bladder pain.

Doctors can mistake endometriosis diarrhea for IBS when patients present with bowel issues. Conditions like pelvic floor dysfunction, ovarian cysts, and adenomyosis have nearly identical pain patterns. (Here is our Do I Have PCOS or Endometriosis? Quiz). Tragically, because the disease often doesn't appear on standard imaging, many patients are told their pain is psychosomatic, anxiety-driven, or just a normal part of having a menstrual cycle.

When to See a Doctor

If you are experiencing any of the 20 symptoms of endometriosis, it is time to seek medical care. Severe pain is never normal.

Seek immediate evaluation if you experience these red flags:

• Pain that forces you to miss school, work, or daily life events

• Bleeding between periods or bleeding after sex

• Sharp pain with bowel movements or urination

• Rectal bleeding during your periods

• Inability to exercise or sit comfortably due to pelvic pain

• Difficulty conceiving after a year of trying (or 6 months if over 35)

How Endometriosis Is Diagnosed

Getting a diagnosis requires finding a doctor who listens. The process generally includes:

• Medical History: A detailed discussion of your cyclical symptoms.

• Pelvic Exam: Checking for cysts or scar tissue behind the uterus.

• Ultrasound: Helpful for spotting endometriomas (chocolate cysts on the ovaries), but cannot rule out early or superficial disease.

• MRI: Used by specialists to map out deep-infiltrating lesions before surgery.

• Diagnostic Laparoscopy: A minimally invasive surgery to visually confirm and ideally remove the disease.

Always remember: It is your right to seek a second (or third) opinion if you feel your symptoms are being dismissed.

Final Thoughts

Daily lifestyle changes can significantly improve how you manage endometriosis. An anti-inflammatory diet, regular exercise, and stress reduction techniques like yoga or meditation can help reduce pain, while keeping a symptom diary makes it easier to track triggers and communicate with your doctor.

For quick pain relief, try heat therapy (like heating pads or warm baths) or over-the-counter topicals such as lidocaine or menthol. TENS units can block pain signals, while gentle stretches like child's pose or pelvic tilts relieve tension. These remedies work best with medical treatments to manage inflammation and tissue growth.

Reading about endometriosis symptoms can be overwhelming, but recognizing your pain is the first step toward healing. Your pain is real, and support is available. Don’t settle for a life dominated by pelvic pain; see an endometriosis specialist for an assessment.

Frequently Asked Questions

Can endometriosis feel like a UTI?

Yes, if endometriosis grows on the bladder or causes pelvic floor muscle spasms, it can mimic the burning, urgency, and frequency of a UTI, even when urine cultures are negative.

Can endometriosis cause constipation?

Absolutely. Pelvic inflammation can cause the pelvic floor muscles to tighten and spasm, making it difficult to pass a bowel movement and leading to chronic constipation.

Is endometriosis worse at night?

Many patients report pain worsening at night due to decreased daytime distractions, shifts in anti-inflammatory hormones like cortisol, and the physical pressure of lying in certain positions.

Can endometriosis cause rectal pain?

Yes, lesions growing on or near the rectum, or deep pelvic floor spasms triggered by the disease, can cause sharp, shooting rectal pain, sometimes referred to as "lightning crotch."

Can endometriosis cause frequent urination?

Yes, lesions irritating the bladder wall or surrounding nerves can make the bladder feel constantly full, leading to frequent trips to the bathroom.

Can endometriosis cause back pain?

Since the nerves supplying the pelvic organs also connect to the lower back, pelvic inflammation often radiates to the lower back, causing deep lumbosacral (lower back) pain.

Is endometriosis pain constant?

It depends on how the disease progresses; early on, pain is typically cyclical with the menstrual cycle, but as nerve sensitization and scar tissue develop, the pain can become a constant daily challenge.