Hard Abdomen: Causes and Possible Explanations

A rigid or hard abdomen can signal serious pathology. It differs from voluntary guarding (patient tenses) and involuntary guarding (peritoneal irritation).

Common Causes

• Constipation/Fecal Impaction: Hard stool mass palpable, often LLQ. History of infrequent BMs.
• Gaseous Distension: Tympanic, diffusely tight. Relieved by passing gas/stool.
• Ascites: Fluid wave, shifting dullness. Causes: cirrhosis, heart failure, malignancy, TB.
• Organomegaly: Hepatomegaly (RUQ), splenomegaly (LUQ), renal masses.
• Abdominal Wall Hernia: Palpable bulge at defect (umbilical, incisional, inguinal). May incarcerate.
• Pregnancy: Gravid uterus (fundal height correlates with weeks).
• Neoplasm: Ovarian, uterine, colonic, gastric masses. Firm, irregular, fixed.
• Peritonitis: Board-like rigidity, rebound tenderness, guarding. Surgical emergency.
• Abdominal Adhesions: Post-surgical; can cause obstruction or chronic firmness.

Associated Symptom: Prolonged Menstrual Bleeding (4 Months)

This is abnormal (menorrhagia/metrorrhagia) and requires separate gynecologic evaluation. Causes include:

• Hormonal: anovulation, PCOS, thyroid dysfunction.
• Structural: fibroids, polyps, adenomyosis.
• Iatrogenic: IUD, anticoagulants.
• Malignancy: endometrial, cervical.
• Coagulopathy: von Willebrand, platelet disorders.

Workup

• History, abdominal/pelvic exam.
• CBC, TSH, coagulation, β-hCG.
• Pelvic ultrasound (transvaginal).
• Endometrial biopsy if >45 or risk factors.
• Abdominal CT/MRI if mass suspected.

Both a hard abdomen and prolonged bleeding warrant prompt medical assessment—they may be related (e.g., large fibroid uterus) or independent.