Endometriosis vs PCOS: Understanding the Differences
Understanding the key differences between Endometriosis and PCOS
Last updated:
⚡ Quick Summary
[Endometriosis](/condition/endometriosis) and PCOS are different conditions that can both affect fertility. Endometriosis causes severe pain from tissue growing outside the uterus; PCOS is a hormonal disorder causing irregular periods and excess androgens. Endometriosis = pain-dominant; PCOS = hormone-dominant. Some women have both. Diagnosis and treatment differ significantly.
Overview
[Endometriosis](/condition/endometriosis) and PCOS (Polycystic Ovary Syndrome) are both common conditions affecting women of reproductive age, but they are very different. Endometriosis involves tissue similar to the uterine lining growing outside the uterus, causing pain. PCOS is a hormonal disorder affecting the ovaries, causing irregular periods and excess androgens. Some women have both conditions, which can complicate diagnosis and treatment.
Key Differences at a Glance
| Feature | Endometriosis | PCOS |
|---|---|---|
| What it is | Tissue grows outside the uterus | Hormonal imbalance affecting ovaries |
| Primary symptoms | Severe pelvic pain, painful periods | Irregular periods, excess hair, acne |
| Pain level | Often severe, debilitating pain | Usually less painful (pelvic discomfort possible) |
| Periods | Painful, may be heavy | Irregular, infrequent, or absent |
| Weight | Often normal or underweight | Often associated with weight gain |
| Hormone issue | Estrogen-dependent growth | Excess androgens (male hormones) |
| Diagnosis | Requires surgery (laparoscopy) | Blood tests, ultrasound, symptoms |
Symptoms Comparison
Symptoms Both Share
- • Fertility problems
- • Pelvic discomfort
- • Irregular periods (can occur in both)
- • Fatigue
- • Mood changes
- • Impact on quality of life
Endometriosis Specific
- • Severe menstrual cramps worsening over time
- • Chronic pelvic pain
- • Pain during sex
- • Pain with bowel movements
- • Heavy periods
- • Bloating ("endo belly")
- • Pain often cyclical with periods
PCOS Specific
- • Absent or very irregular periods
- • Excess facial/body hair (hirsutism)
- • Acne (often severe)
- • Male-pattern hair loss
- • Weight gain (especially around abdomen)
- • Darkened skin patches
- • Multiple small ovarian cysts on ultrasound
Causes
Endometriosis Causes
- • Tissue grows outside uterus
- • Retrograde menstruation theory
- • Immune dysfunction
- • Genetic factors
- • Estrogen-dependent
PCOS Causes
- • Hormonal imbalance
- • Insulin resistance common
- • Excess androgens
- • Genetic factors
- • Often linked to metabolic issues
Treatment Options
Endometriosis Treatment
- ✓ Hormonal birth control
- ✓ GnRH agonists (Lupron)
- ✓ Orilissa (elagolix)
- ✓ Excision surgery
- ✓ Pain management
- ✓ Anti-inflammatory diet
PCOS Treatment
- ✓ Birth control pills (regulate periods)
- ✓ Metformin (insulin resistance)
- ✓ Spironolactone (excess hair/acne)
- ✓ Clomid for fertility
- ✓ Lifestyle changes (weight loss)
- ✓ Low-carb diet often helps
How Long Does It Last?
Endometriosis
[Endometriosis](/condition/endometriosis) is chronic, typically improving after menopause. Pain may be managed with medication or surgery. Pregnancy often provides temporary relief. No cure, but symptoms can be controlled.
PCOS
PCOS is a lifelong hormonal condition. Symptoms may improve with weight loss and treatment. Does not go away after menopause but symptoms change. Increases risk of [diabetes](/condition/type-2-diabetes) and heart disease.
When to See a Doctor
Seek medical attention if you experience any of the following:
- ⚠️ Severe menstrual cramps
- ⚠️ Pelvic pain affecting daily life
- ⚠️ Very irregular or absent periods
- ⚠️ Difficulty getting pregnant
- ⚠️ Excess facial hair or acne
- ⚠️ Unexplained weight gain
Frequently Asked Questions
Frequently Asked Questions about Endometriosis vs PCOS
Click on a question to see the answer.
Yes, about 7-10% of women have both conditions. This can complicate diagnosis since symptoms overlap. Having both may worsen fertility challenges. Treatment needs to address both conditions. If you have one, watch for symptoms of the other.
Both can affect fertility, but differently. [Endometriosis](/condition/endometriosis) causes scarring and inflammation that can block tubes or affect egg quality. PCOS affects ovulation - eggs may not release regularly. Both are treatable causes of infertility. Many women with either condition conceive with treatment.
[Endometriosis](/condition/endometriosis) definitively requires surgery (laparoscopy) to visualize and biopsy the tissue. PCOS is diagnosed with blood tests (hormone levels), ultrasound (polycystic ovaries), and symptoms (irregular periods, excess androgens). Two of three criteria diagnose PCOS.
Medical Disclaimer
The information on this page is for educational purposes only and is not intended as medical advice. It should not be used for self-diagnosis or self-treatment. Always seek the guidance of a qualified healthcare professional with any questions you have regarding a medical condition. If you are experiencing a medical emergency, call your local emergency services immediately.