A stiff neck often occurs when one of the muscles becomes strained or tense. Stiffness can also develop if one or more of the vertebrae is injured. A stiff neck may become painful when a person tries to move their neck or head.Usually, a stiff neck results from a minor injury or incident. People can often relieve the stiffness at home. In rare cases, however, it can be a sign of a serious illness that requires medical treatment. Stiffness usually occurs when the neck muscles are overused, stretc

Do you know what causes your stiff neck? | Spine-health