Pain in the upper left abdomen can have many possible causes, including:
Pancreatitis
Pancreatic cancer
Enlarged spleen (splenomegaly)
Inflammation of the lining of the stomach (gastritis) Stomach
ulcer Bile
reflux Stomach
cancer Kidney
infection
Kidney stones
Pain in this part of the abdomen may also occur in the chest due to:
Heartburn Angina
, which is chest pain caused by coronary artery disease
Chest pain not related to the heart
Heart attack
Inflammation of the tissue surrounding the heart (pericarditis)
Pneumonia
Inflammation of the lining of the lungs (pleuritis)
Pulmonary embolism
Abdominal pain on the right side