Abdominal Pain Evaluation and Management

Initial Assessment and History

The American College of Physicians recommends obtaining pregnancy status in all women of reproductive age before proceeding with any diagnostic workup or imaging, as this fundamentally alters the diagnostic approach and prevents unnecessary fetal radiation exposure 1, 2, 3
Location specificity of pain is the most valuable starting point, with right upper quadrant suggesting hepatobiliary disease, right lower quadrant indicating appendicitis, left lower quadrant pointing to diverticulitis, and diffuse pain requiring broader evaluation 4, 2
Fever raises concern for infection, abscess, or inflammatory processes and warrants blood cultures if sepsis is suspected 1, 2
Diarrhea may indicate infectious or inflammatory bowel disease 3
Urinary symptoms should be evaluated to assess for urinary tract infection or nephrolithiasis 1
Hemodynamic instability requires immediate surgical consultation rather than extended workup 2
Jaundice suggests hepatobiliary pathology 4

A history of any chronic pain condition is the strongest predictor of transition from acute to chronic pain 5
Immunocompromised status requires more extensive workup 1
Inflammatory bowel disease history is relevant, as pain may represent active inflammation, stricture, or functional overlay 5
Early-life adversity, trauma, discrimination experiences, or poverty are psychosocial risk factors for chronic pain development 5
Poor coping styles, including catastrophizing, pre-existing anxiety or depression, disability status, substance misuse history, or worker's compensation, hasten conversion to chronic pain 5
Availability of positive social support versus pain-reinforcing environmental factors is important 5

Pelvic examination in women with lower abdominal pain is necessary to evaluate gynecologic causes 2
Cardiovascular examination is relevant if considering mesenteric ischemia 1

Complete blood count is necessary to assess leukocytosis indicating infection or inflammation 1, 3
Comprehensive metabolic panel, including liver function tests, is required to evaluate hepatobiliary pathology and organ function 1, 3
Urinalysis is necessary for urinary tract infection or nephrolithiasis 1
Serum lipase is specific for pancreatitis 1, 3
Beta-hCG is mandatory in all women of reproductive age before imaging 1, 2, 3

Never proceed with CT imaging in reproductive-age women without pregnancy testing, as this leads to delayed diagnosis of ectopic pregnancy and unnecessary fetal radiation exposure 1, 2, 3
Do not order conventional radiography routinely, as it has limited diagnostic value and rarely changes management 4, 1, 2
Do not assume normal initial labs exclude serious pathology in patients with high clinical suspicion—proceed to appropriate imaging 1
In immunocompromised patients, maintain a lower threshold for extensive workup, as presentation may be atypical 1
For chronic pain patients, recognize that peripheral initiating factors differ from central maintaining factors—address fear of pain and central sensitization rather than repeatedly investigating resolved inflammation 5
Do not delay imaging in clinically deteriorating patients while pursuing additional non-diagnostic tests 2