6 Symptoms You Should Never Ignore

Most of us, I'd hope, would call a doctor if we were struck by blinding head pain, suddenly couldn't feel one side of our body, or, frankly, noticed fist-size bumps emerging from our foreheads. But some symptoms aren't so obviously dire. We asked writer Allen St. John to put together a list of surprising symptoms you should never ignore. Why? Because your life may literally be hanging in the balance. Call your doctor immediately if you feel . . .

1. SEVERE BACK PAIN
What it feels like:
Similar to the kind of agony you'd expect if you'd tried to bench press an armoire. The usual remedies—heat, rest, OTC painkillers—offer no relief.

What it could be: "If it's not related to exercise, sudden severe back pain can be the sign of an aneurysm," says Sigfried Kra, M.D., an associate professor at the Yale school of medicine. Particularly troubling is an abdominal aneurysm, a dangerous weakening of the aorta just above the kidneys. If it bursts, you’ll die within minutes.