Stomach Burning, Nausea, and Left Side Back Pain: Potential Causes and What to Do

This symptom cluster suggests several possible conditions, some serious.

Differential Diagnosis

1. GERD: Heartburn, nausea, referred back pain (esophageal-spinal convergence).
2. Peptic ulcer: Epigastric pain, nausea, vomiting; may radiate to back.
3. Pancreatitis: Severe epigastric pain radiating to back, nausea, vomiting. Gallstones, alcohol, triglycerides.
4. Kidney stone: Flank/back pain, nausea, vomiting, hematuria.
5. Cholecystitis: RUQ pain (not left), but can refer; nausea, fever.
6. Diverticulitis: LLQ pain, fever, nausea.
7. Splenic pathology: Splenic infarct, rupture (trauma), enlargement → LUQ/back pain.
8. Gynecologic (women): Ovarian cyst, ectopic pregnancy, endometriosis.
9. Cardiac: Atypical MI presentation (epigastric pain, nausea).

Red Flags (Emergency)

• Chest pain, diaphoresis, dyspnea
• Hemodynamic instability
• Severe, tearing back pain (aortic dissection)
• Fever with rigidity

Action

Seek immediate medical evaluation. Do not self-diagnose. History, exam, labs (lipase, CBC, UA, ECG, imaging) will clarify.