10 Nervous Habits That Hurt Your Health

crack-neck
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You crack your neck

Twisting your head forcibly to one side releases gases built up in the the joints between vertebrae and creates a popping sound. Although this may feel good, repeatedly cracking your neck can make the surrounding ligaments hypermobile and more susceptible to injury, says Michael Gleiber, MD, a board-certified orthopedic surgeon and affiliate assistant professor at Florida Atlantic University's Charles E. Schmidt College of Medicine in Boca Raton. In addition, this excessive motion on the facet joints themselves can cause wear within the joints and may result in arthritis over time. In rare cases neck cracking may trigger a stroke, says Dr. Gleiber.

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