Many people think heart attacks strike without warning, but medical experts say the body often signals trouble weeks in advance. These early signs can develop gradually and are easy to overlook or confuse with everyday issues. Recognizing them early can help someone get medical care before a serious cardiac event occurs.

One common warning is unusual fatigue that doesn’t improve with rest. Even simple tasks can leave a person feeling drained, or energy levels may drop for no obvious reason. Shortness of breath during normal activities is another potential indicator, as is intermittent chest discomfort, pressure, or tightness that isn’t sudden but comes and goes.

Some symptoms are less obvious. Trouble sleeping, dizziness, or digestive issues like nausea or indigestion can also signal heart problems. Pain that spreads to the arms, shoulders, neck, or jaw may start mild but can gradually become more noticeable.

Swelling in the legs, feet, or ankles is another potential warning. It can happen when the heart struggles to pump blood, leading to fluid buildup. Irregular or rapid heartbeats may also indicate that the heart isn’t functioning properly.

While these signs don’t always mean a heart attack is imminent, doctors stress that unusual or persistent changes in the body should never be ignored. Paying attention and seeking medical evaluation early can help detect heart issues and potentially prevent a life-threatening event.