Ovarian cancer does cause pain for many women, though it’s not always the sharp, obvious pain you might expect. About 40% of women report abdominal or pelvic pain at the time of diagnosis, making it the single most common symptom. The pain is often described as a dull ache, a sense of pressure, or discomfort that could easily be mistaken for gas, menstrual cramps, or acid reflux.
What the Pain Actually Feels Like
Clinicians at MD Anderson Cancer Center note that patients commonly describe ovarian cancer pain as a constant dull ache in the lower abdomen. But it doesn’t always stay in one spot. Many women also feel discomfort or bloating in the upper abdomen, even though the ovaries sit low in the pelvis. The pain can come and go or persist for days at a time. It may feel like pelvic pressure, indigestion, or cramping that doesn’t line up with your menstrual cycle.
This vagueness is part of what makes ovarian cancer tricky to catch. The sensations overlap with dozens of common, harmless conditions. What sets ovarian cancer pain apart isn’t its character so much as its pattern: it’s new, it’s persistent, and it doesn’t have an obvious explanation.
Pain in Early vs. Advanced Stages
A common misconception is that ovarian cancer only hurts once it’s advanced. Even early-stage disease can produce symptoms. One study found only minor differences in reported symptoms between women with early and later stage disease. The key distinction is that women with more advanced cancer tend to experience symptoms more frequently and at higher intensity, sometimes 20 to 30 times per month.
As the disease progresses, new sources of pain emerge. Tumors can grow large enough to press on the bladder, bowel, or surrounding pelvic structures. Fluid can accumulate in the abdomen, a condition called ascites, which causes visible swelling and a painful, tight feeling in the belly. In advanced cases, bowel obstruction becomes a real risk, bringing acute pain, nausea, vomiting, and the inability to pass gas or stool.
Lower Back Pain and Referred Pain
Over half of women with ovarian cancer (52%) report unusual abdominal or lower back pain, compared to just 15% of women without the disease. This back pain happens because the pelvis shares nerve pathways with the lower spine. A growing tumor or fluid buildup in the pelvic area can trigger pain signals that register in the lower back instead of, or in addition to, the abdomen.
The challenge is distinguishing this from ordinary back strain. The pattern matters most: back pain from ovarian cancer tends to be a new symptom without a clear musculoskeletal cause, and it typically shows up alongside other changes like bloating, feeling full quickly, or needing to urinate more often.
Pain During Sex
Ovarian masses, both benign and malignant, can cause deep pain during intercourse. This pain is often one-sided, corresponding to whichever ovary is affected. If you’re experiencing new, deep pelvic pain during sex that wasn’t there before, especially alongside other symptoms on this list, it warrants a transvaginal ultrasound to evaluate the ovaries.
Symptoms That Accompany the Pain
Pain rarely shows up alone. In a large UK study of 574 women with ovarian cancer, the most commonly reported symptoms were:
- Abdominal or pelvic pain: 39.5%
- Increased abdominal size or bloating: 39.2%
- Change in bowel habits: 20%
- Loss of appetite or feeling full quickly: 14.6%
- Unexplained weight loss: 11.7%
- Urinary frequency: 6.8%
A particularly telling combination is bloating, increased abdominal size, and urinary symptoms appearing together. This cluster was found in 43% of women with ovarian cancer but only 8% of women seen in primary care clinics for other reasons.
How It Differs From Ovarian Cyst Pain
Benign ovarian cysts can cause symptoms nearly identical to ovarian cancer: pelvic pain, bloating, pressure, and urinary urgency. You cannot tell the difference based on symptoms alone. Imaging is required.
That said, there are a few practical clues. Cyst pain often comes and goes with the menstrual cycle, and a ruptured cyst typically causes sudden, intense pain after physical activity. Ovarian cancer pain tends to be more persistent, more recently developed, and accompanied by systemic symptoms like fatigue, weight loss, or feeling full after eating very little. Cysts also don’t usually cause the progressive worsening and symptom accumulation that cancer does over weeks and months.
When Pain Patterns Should Raise Concern
The threshold that clinicians use is straightforward: if you’re experiencing bloating, pelvic or abdominal pain, or urinary changes more than 12 times per month, and these symptoms are new or clearly different from your baseline, further evaluation is warranted. Women with ovarian cancer typically report symptoms that are more severe than expected, more frequent than expected, and of recent onset, often developing within the past several months rather than being longstanding.
Nearly all women with ovarian cancer (93%) report at least one symptom before diagnosis. The most distinguishing symptom is unusual bloating, fullness, and pressure in the abdomen, which was 25 times more common in women with ovarian cancer than in controls. Abdominal or back pain was about 6 times more common. These aren’t subtle statistical differences. The symptoms are there. The difficulty is recognizing them as something beyond everyday digestive complaints, especially when they start mild and build gradually.