Neck spasms are involuntary contractions of muscles in the neck. These spasms can be quite painful. They are commonly caused by injury, stress, poor posture, and even poor sleeping habits like sleeping on your stomach. Highland Orthopedic Supply has included the most common products used to relieve the symptoms of neck spasms in this category. Need Help? call us at 1-800-583-3771. Our specialists look forward to assisting you.