Doctors share 5 symptoms that need your immediate attention

It might be a caffeine headache, but it might be an aneurysm. Great. Now, at the very least, it's a stress headache.

We asked the experts to tell us five signs that your body is telling you something. And why you should do something about it. (Namely, call your doctor.)

Headache

If you're saying the words "worst headache of my life," said Camelia Davtyan, clinical professor of medicine at UCLA, it's time to make a call.

"It may be caused by an aneurysm that can burst and lead to sudden death," she said.

Or it could be bleeding on the brain, encephalitis, meningitis or some other viral or bacterial infection within the spinal fluid, said Joshua Miller, medical director at the Cleveland Clinic's Strongsville Family Health Center.

"The headaches that worry us are ones that start suddenly, like a thunderclap," he said. "Especially if it's accompanied by a stiff neck, nausea, fever, bright lights bothering your eyes."

Chest pain

Some chest pain is obvious - and obviously alarming. "A squeezing pressure, elephant-sitting-on-your-chest feeling," Miller said. "You may have nausea and shortness of breath and feel your heart fluttering."

But some symptoms are less noticeable. Miller said to be mindful of how your body recovers from activities you're used to performing.

"If you climb a flight of stairs every day and you usually feel fine, and then one day you get to the top and feel short of breath, panting, a little pressure in your chest, you shouldn't ignore that," he said. "We worry about cardiovascular events, aortic dissections, an impending blockage of a blood vessel in the heart, possibly pneumonia."

"People may think it's heartburn," Davtyan added, "particularly women."

Abdominal pain

"It may be attributed to digestion problems and ignored," Davtyan said, "But it may be caused by appendicitis or kidney stone, which can get worse quickly if not treated."

Pay particular attention to pain that's accompanied by a fever or vomiting.

"If there's a fever or so much pain that you're unable to eat or drink, you've got potential gall bladder diseases, appendicitis, something infectious going on," Miller said.

In addition, be mindful of a recent change in your bowel movements.

"If you're having severe diarrhea or black or bloody stools, it can be a warning sign of an abdominal aneurysm," Miller said. "This is something we get particularly concerned about in our elderly patients because it can also mean low blood flow to the colon. If it's not acted on quickly you can end up needing emergency surgery."