To know if you have endometriosis, pay attention to symptoms such as pelvic pain—especially painful periods that are worse than usual and may last several days—pain during or after sex, pain with bowel movements or urination (often linked to menstrual periods), heavy or irregular menstrual bleeding, and fatigue. Some people also experience infertility or symptoms like diarrhea, constipation, bloating, or nausea around their period. However, symptom severity doesn’t always reflect the extent of endometriosis, and some people may have no symptoms at all. Because these symptoms overlap with other conditions like irritable bowel syndrome or pelvic infections, seeking medical evaluation is important. Diagnosis typically begins with a healthcare provider asking about symptoms and performing a pelvic exam to check for cysts, nodules, or scars. Imaging tests, such as transvaginal ultrasound or MRI, can help detect cysts (endometriomas) or plan for surgery but cannot definitively diagnose endometriosis. The only definitive way to confirm endometriosis is through a laparoscopy, a minimally invasive surgery where a surgeon visually inspects the abdomen and possibly takes a tissue biopsy. This procedure may also allow for treatment during the diagnosis. If you experience chronic or severe pelvic pain or other symptoms mentioned, see a gynecologist to discuss these symptoms and undergo appropriate testing to confirm diagnosis and receive timely management.