A Boston news station poll found that people are feeling chronically angry about almost everything these days.

The problem with that, as Mark Twain once said, is that “anger is an acid that can do more harm to the vessel in which it is stored than to anything on which it is poured.”

Boy was he right.

Your blood vessels are damaged by chronic anger — and even a brief flareup changes the way they function. A new National Institutes of Health study shows that anger reduces blood vessels’ ability to dilate, and that can lead to long-term damage that increases your risk of heart attack and stroke.

The good news? Anger management techniques can not only make relationships with those around you run more smoothly, they can also help you prevent heart disease.

We have long advocated mindful meditation for 10 minutes in the morning and evening. Regular physical exercise also dispels stress and anger, as does cultivating a posse of supportive pals and finding a purpose that inspires you.

What you eat also influences your mood. Harvard Medical School says that studies show Mediterranean and traditional Japanese diets reduce your risk of depression by 25% to 35% compared to eating a typical American diet.

And a new study in the journal Nature Mental Health says that there’s a profound connection between a healthy diet and a healthy mental state.

You also may want to explore the benefits of stress-soothing supplements such as ashwagandha.