What could cause left lower abdominal pain in males?
Left lower abdominal pain in males can arise from a variety of anatomical and pathological causes, given the presence of multiple organs and structures in this region—including parts of the descending and sigmoid colon, the left ureter, the left spermatic cord and testicle (via referred pain), the left iliac fossa, and occasionally loops of small bowel. Common etiologies include:
Colonic conditions are among the most frequent causes. Diverticulitis—particularly in older adults—is characterized by localized tenderness, low-grade fever, and sometimes constipation or diarrhea. Constipation or fecal impaction may also produce dull, crampy discomfort due to distension or spasm. Less commonly, inflammatory bowel disease (e.g., ulcerative colitis or Crohn’s disease) may present with left-sided abdominal pain, often accompanied by bloody diarrhea, urgency, and weight loss.
Urological causes must be carefully considered. Left-sided ureteral stones can cause sharp, colicky pain radiating to the groin or testicle, often associated with hematuria, nausea, and urinary frequency or dysuria. A left-sided urinary tract infection (e.g., pyelonephritis or cystitis) may present with suprapubic or flank pain, but in some cases, inflammation can localize to the left lower quadrant—especially if complicated by bladder wall irritation or adjacent peritoneal involvement.
Genitourinary and musculoskeletal sources also merit evaluation. While testicular torsion or epididymo-orchitis typically cause scrotal pain, referred discomfort may manifest in the left lower abdomen. Similarly, inguinal hernias—especially indirect or sliding hernias containing sigmoid colon or omentum—can produce intermittent or persistent dull ache or pressure, worsened by straining or lifting. Musculoskeletal strain of the abdominal wall (e.g., rectus abdominis or external oblique) or pelvic floor muscles may mimic visceral pain, particularly after physical exertion or trauma.
Less common but critical diagnoses include abdominal aortic aneurysm (though more typical in the midline or epigastric region, rupture or expansion may refer pain laterally or inferiorly), mesenteric ischemia (especially in patients with cardiovascular risk factors), or malignancy (e.g., sigmoid colon cancer presenting with change in bowel habits, iron-deficiency anemia, or palpable mass). In younger men, functional gastrointestinal disorders such as irritable bowel syndrome (IBS) may cause recurrent, non-alarming left lower quadrant discomfort associated with altered stool form and passage.
Red flags warranting urgent evaluation include fever, vomiting, hematuria, melena or hematochezia, palpable mass, significant weight loss, or pain that is sudden, severe, or progressively worsening. A thorough history—including onset, character, duration, exacerbating/relieving factors, and associated symptoms—as well as physical examination (including genital and hernia assessment) and targeted investigations (e.g., urinalysis, CBC, CRP, renal function, abdominal ultrasound, or CT scan) are essential for accurate diagnosis and timely management.