If you have any emergency warning signs — for example a pressure or crushing chest pain lasting more than 5–10 minutes, pain spreading to the left arm, jaw, neck or back, shortness of breath, cold sweats, fainting or near‑fainting, nausea, or a sudden very severe tearing pain into the back — call emergency services immediately (e.g. 112 or 911 depending on where you are) or go to the nearest emergency department. Pain in the left chest that radiates to the back can come from many different structures. Common categories include musculoskeletal problems (muscle strain, costochondritis), gastroesophageal causes (gastroesophageal reflux disease, esophageal spasm), pleural or lung causes (pleural irritation, pneumonia), cardiac causes (coronary problems such as Anjina (stable/unstable angina) or Acute myocardial infarction) and vascular emergencies (rare aortic disease causing severe back pain). Other causes include shingles or anxiety. This list describes possible causes and is not a diagnosis. If there are no emergency signs, initial assessment in primary care is reasonable. To exclude or investigate a cardiac cause the clinician may perform an ECG, order blood tests (cardiac enzymes) and, if indicated, imaging. Depending on findings you may be referred to Cardiology, Emergency Medicine, Chest Diseases, Internal Medicine, Orthopedics and Traumatology, Gastroenterology or Infectious Diseases and Clinical Microbiology. Low‑risk self‑care measures you can try at home: rest, note timing and triggers (for example exertion, meals, movement or deep breaths), avoid heavy physical effort, keep up fluids, and seek medical evaluation if symptoms continue or worsen. If you have risk factors such as smoking, high blood pressure, diabetes or high cholesterol, discuss these with your primary care clinician. This information is general and not a personal medical diagnosis or treatment plan. If emergency warning signs are present, seek urgent help without delay.
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