There is not one single first sign of heart disease. For many people, the earliest clue is chest discomfort, pressure, or shortness of breath when they exert themselves. Pain can also show up in the neck, jaw, back, shoulders, or arms.
Some people, especially women, may notice tiredness, nausea, sweating, anxiety, or upper-body discomfort instead of obvious chest pain. NHLBI also notes that some people do not know they have coronary heart disease until they have a heart attack.
If the symptoms are sudden, severe, or new, treat them as urgent. Heart symptoms are one of the cases where it is better to overreact than to miss a real emergency.
Sources
This is general information, not professional medical advice. For decisions about your situation, talk to a qualified professional.
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