Seek emergency care now if the pain is sudden or severe, follows a fall/blow to the left ribs or abdomen, or occurs with fainting/dizziness, a fast heartbeat, fever, repeated vomiting, a rigid abdomen, blood in vomit/stool, chest pain, shortness of breath, or pain felt at the left shoulder. These may indicate internal bleeding or another urgent condition. The
MedlinePlus abdominal-pain guidance also advises prompt assessment for worsening pain, fever, nausea/vomiting, or persistent symptoms.
If none of those apply, arrange a medical review within 24-48 hours if it does not settle or keeps recurring.