|Although some heart attacks are sudden and intense, most start slowly, with only mild pain and discomfort. Here are some warning signs:
Chest discomfort. Discomfort in the center of the chest that lasts more than a few minutes, or that goes away and comes back. It can feel like uncomfortable pressure, squeezing, fullness or pain.
Upper body discomfort. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach.
Shortness of breath. This feeling often comes along with chest discomfort. But it can occur before the chest discomfort.
Other signs could include breaking out in a cold sweat, nausea or light-headedness.