Early Warning Signs and Symptoms of Diverticulitis

At Phoenix Unified Surgeons, we often see patients concerned about abdominal pain and digestive symptoms. One common question is whether diverticulitis can develop without a fever. The answer is yes—diverticulitis can occur in its early stages without an elevated temperature. While fever is frequently associated with diverticulitis, especially when infection or inflammation is advanced, it is not present in every case.

Some patients may notice symptoms such as persistent abdominal pain—most commonly in the lower left side—changes in bowel habits (like constipation or diarrhea), bloating, or abdominal tenderness, even if their body temperature remains normal. The absence of a fever does not rule out the possibility of diverticulitis. In fact, when symptoms are mild or subtle, diagnosis may be delayed.

At Phoenix Unified Surgeons, our team emphasizes the importance of seeking prompt medical evaluation if you experience ongoing abdominal discomfort or changes in your digestive health. Early diagnosis and appropriate management are essential to prevent complications from diverticulitis, regardless of whether a fever is present.

At Phoenix Unified Surgeons, we frequently diagnose and treat diverticulitis, a common condition affecting the colon. Early diverticulitis usually presents with lower abdominal pain—most often on the left side—along with fever, nausea, and changes in bowel habits such as constipation or diarrhea. However, our experience shows that patients may also experience additional symptoms that aren’t always immediately recognized as being related to diverticulitis.

For example, some patients seen at Phoenix Unified Surgeons report lower back pain. Although less common than abdominal pain, this discomfort may occur due to the proximity of the inflamed colon to the muscles and nerves in the lower back. The inflammation can irritate these nearby structures, resulting in pain that radiates to the back.

Additionally, urinary symptoms such as increased frequency, urgency, or discomfort during urination can occasionally occur with diverticulitis. The sigmoid colon, where diverticulitis most often develops, sits near the bladder. As a result, inflammation in this area can irritate the bladder or even cause a secondary urinary tract infection, leading to urinary symptoms.

While back pain and urinary discomfort are not the most typical early signs of diverticulitis, their presence—especially if accompanied by hallmark symptoms like abdominal pain and fever—should not be overlooked.

At Phoenix Unified Surgeons, we understand that diverticulitis can present differently in older adults compared to younger individuals. While the classic symptoms—such as lower left abdominal pain, fever, nausea, and changes in bowel habits—are well known, these signs may not always be as clear-cut in our older patients.

In elderly individuals, abdominal pain might be milder, less localized, or even absent altogether. Instead, symptoms may be vague, including general weakness, confusion, or a sudden decline in overall function. Fever can also be less noticeable. Sometimes, the first indication of diverticulitis in older adults is the development of complications like abscesses, perforation, or sepsis, rather than the more typical early symptoms.

This atypical presentation can make diagnosis more challenging and may lead to delays in treatment. Many older adults also have other health conditions or take medications that can mask symptoms or alter the body’s usual response to inflammation. For these reasons, the surgical team at Phoenix Unified Surgeons maintains a high level of vigilance when evaluating older patients who may be at risk. We frequently rely on advanced diagnostic imaging, such as CT scans, to ensure prompt and accurate diagnosis.

If you or a loved one experience unusual or sudden changes in health, especially in the presence of known diverticular disease, we encourage you to seek evaluation promptly. At Phoenix Unified Surgeons, our skilled team is committed to providing thorough assessment and expert surgical care tailored to the unique needs of each patient—including our valued older adults.

At Phoenix Unified Surgeons, our team takes a comprehensive approach to evaluating patients with mild symptoms of diverticulitis. Our board-certified surgeons begin with a detailed medical history and physical examination to assess your condition and identify any risk factors.

To further evaluate inflammation or infection, we commonly order laboratory tests such as a complete blood count (CBC) and C-reactive protein (CRP) level. These tests help us detect elevated white blood cells and measure the degree of inflammation, which are important indicators in the diagnosis of diverticulitis.

For definitive diagnosis, our practice utilizes advanced imaging studies. At Phoenix Unified Surgeons, we rely on abdominal and pelvic computed tomography (CT) scans, the gold standard for identifying diverticulitis—even in patients with mild symptoms. CT imaging enables us to visualize inflamed or infected diverticula and to rule out other potential causes of abdominal pain, ensuring a precise diagnosis. In select cases—such as for pregnant patients or when radiation exposure should be limited—our team may recommend an abdominal ultrasound as an alternative.

We advise against performing a colonoscopy during the acute phase of diverticulitis due to the risk of bowel perforation. However, our surgeons may recommend a colonoscopy a few weeks after recovery to exclude other conditions like colorectal cancer or inflammatory bowel disease that can present with similar symptoms. Stool tests may also be considered in our diagnostic process, especially if diarrhea is present, to rule out infectious causes.

At Phoenix Unified Surgeons, our multidisciplinary approach combines thorough clinical evaluation, targeted laboratory testing, and state-of-the-art imaging. This ensures our patients receive an accurate diagnosis and an individualized treatment plan—starting from your very first visit.

At Phoenix Unified Surgeons, Dr. Debora J. Fox, MD, MBA, FACS, FASCRS, and her team are highly experienced in the early identification and management of diverticulitis. We begin with a comprehensive clinical evaluation, starting with a detailed patient history. Our surgeons will inquire about hallmark symptoms such as abdominal pain—typically in the lower left quadrant—along with changes in bowel habits, fever, nausea, and any recent gastrointestinal disturbances. We also carefully consider risk factors, including age over 40, a low-fiber diet, and a known history of diverticulosis, to maintain a high level of clinical suspicion for diverticulitis.

During the physical examination at Phoenix Unified Surgeons, our providers assess for localized tenderness in the left lower abdomen and evaluate for signs of peritoneal irritation, such as rebound tenderness or guarding, which may signal more serious complications. We routinely order laboratory tests, including a complete blood count to check for elevated white blood cells, and additional markers like C-reactive protein to detect inflammation.

Advanced imaging is a cornerstone of our diagnostic approach. At Phoenix Unified Surgeons, we utilize state-of-the-art CT scanning of the abdomen and pelvis to accurately identify inflamed or infected diverticula, detect complications such as abscesses, perforation, or fistulas, and to rule out other potential causes of your symptoms. In select cases, such as when minimizing radiation exposure is important, we may also recommend abdominal ultrasound.

Our commitment is to provide timely and accurate diagnosis by integrating each patient’s clinical presentation, risk factors, physical findings, laboratory results, and imaging studies. Early detection of diverticulitis allows us to initiate appropriate treatment and prevent complications. Our surgeons stay current with the latest clinical guidelines and regularly participate in continuing medical education to ensure the highest standard of care for our Phoenix community.

If you have concerns about abdominal pain or possible diverticulitis, trust the expertise of Phoenix Unified Surgeons for thorough evaluation and compassionate care. For more information, contact us or request an appointment online. We are conveniently located at 20333 N 19th Avenue, Ste 230 Phoenix, AZ 85027. We serve patients from Phoenix AZ, Sun City AZ, Peoria AZ, Surprise AZ, Glendale AZ, Scottsdale AZ, and surrounding areas.