Epidemic myalgia

Epidemic myalgia, also called Bornholm disease, is a viral infection caused by Coxsackie virus that causes sudden severe pain in the chest and upper abdomen muscles. The sharp, stabbing pain often worsens with breathing or movement and may be mistaken for a heart attack or pneumonia. The condition typically resolves within a week with rest and pain relief medication, though the pain can be quite intense during the illness.