Prevalence, risk factors, and pain trajectories for persistent pain after repeated cesarean delivery: a prospective observational study

Pain after surgery is a universal human experience, a temporary signal that the body is healing. For most people, this signal fades as the wound closes and the tissues knit back together. But for a significant number of women who undergo cesarean delivery, that signal does not turn off. It lingers, transforming from a sharp, acute warning into a persistent ache that can last for months or years. This lingering pain is not just a physical nuisance; it can erode a mother's ability to care for her newborn, disrupt sleep, and cast a shadow over the early weeks of parenthood. While doctors know that having a cesarean section once increases the risk of pain, the experience of women who have had the procedure more than once remains a complex puzzle. These repeat surgeries often involve more scar tissue and adhesions, making the operation technically more difficult and potentially more painful, yet the specific patterns of who suffers long-term and why have remained unclear.

A team of researchers at the Women's Hospital of Nanjing Medical University set out to map this landscape with precision. They followed 357 women who were scheduled for their second or subsequent cesarean delivery, tracking them closely from the day before surgery through the first ninety days of recovery. The goal was not merely to count how many women felt pain, but to understand the shape of that pain: how it changed over time, where it was felt, and what factors in a woman's life or body predicted who would struggle to recover. By listening to these women at specific intervals—on the first day, the first week, and then at six, eight, and twelve weeks—the researchers built a detailed picture of the recovery journey, looking for the hidden threads that tied a difficult start to a long-term struggle.

The results revealed a story of rapid improvement for most, but a stubborn minority for whom the pain refused to fade. On the very first day after surgery, nearly every woman in the study reported feeling pain, with half of them describing it as moderate to severe. This was expected; the body was reacting to a major surgical event. However, the trajectory of recovery was not uniform. By the first week, the number of women feeling pain had dropped significantly, and by the third month, the majority had returned to a state of comfort. Yet, even at ninety days, roughly one in four women still reported feeling pain of some kind. For a small group, this was not a fleeting discomfort but a persistent presence, ranging from a dull ache around the incision to a deeper, more constant discomfort in the lower back or pelvis.

To understand why some women remained in pain while others recovered quickly, the researchers looked beyond the surgery itself. They examined a wide range of potential causes, from the amount of blood lost during the operation to the woman's age and the time since her previous cesarean. The data pointed to two distinct factors that stood out as powerful predictors of long-term pain. The first was a woman's mental state before the surgery. Those who screened positive for anxiety before the operation were nearly three times more likely to still be in pain three months later. The second factor was the intensity of a specific type of pain felt on the very first day after delivery: the cramping pain caused by the uterus contracting. Women who reported higher levels of this visceral, internal pain on day one were significantly more likely to carry that pain forward into the future. Interestingly, other common fears, such as a deep-seated fear of pain itself or a tendency to imagine the worst about pain, did not show the same strong link to long-term suffering in this specific group of women.

The study also uncovered that these women did not all recover in the same way. By analyzing the patterns of their pain scores over time, the researchers identified three distinct groups. The largest group, comprising about 81 percent of the women, experienced consistently low pain that stayed low throughout the three months. A second group, about 10 percent, started with severe pain that slowly and steadily improved, taking the full three months to reach a comfortable level. The third group, representing roughly 8 percent, was the most concerning; these women began with moderate pain and stayed there, showing no real improvement over the entire three-month period. This "stuck" group was characterized by high levels of anxiety and a history of pain during their pregnancy, suggesting that their bodies remained in a state of heightened sensitivity that the standard pain management protocols did not fully address.

The findings suggest that the path to recovery after a repeat cesarean is deeply influenced by the mind as much as the body. While the surgery itself is a physical event, the experience of pain is filtered through a woman's psychological state and her immediate physical response to the procedure. The researchers noted that their ability to predict exactly who would suffer long-term pain was modest; they could identify risk factors, but they could not yet pinpoint every individual who would struggle. This limitation highlights the complexity of pain, which is woven from biological, psychological, and social threads that are difficult to untangle. The study does not offer a simple cure, but it does offer a clearer map. It suggests that for women facing a repeat cesarean, paying close attention to their anxiety levels before surgery and managing the intense cramping pain immediately after could be crucial steps in preventing a short-term recovery from turning into a long-term burden. For the small subset of women who find themselves in that persistent pain group, the data indicates a need for more targeted support, perhaps involving emotional reassurance or specialized pain strategies, to help them break the cycle of discomfort and return to the fullness of motherhood.