Stiffness and pain on both sides of the neck and dizziness may be caused by cervical spondylosis, trauma, fasciitis and other diseases. 1. Cervical spondylosis: due to cervical degeneration caused by cervical curvature changes leading to stiffness of the neck muscles, pain, and in some serious cases, cause the vertebral basilar artery system blood supply is insufficient, the patient may appear dizziness and other symptoms. 2. Trauma: Fractures and dislocations of the cervical vertebrae, especially those of the atlantoaxial vertebrae, can cause stiffness of the neck, headache and dizziness, postauricular nerve pain, nausea and vomiting, and other symptoms. 3. Fasciitis: due to long-term poor neck and shoulder posture, resulting in chronic inflammation of the soft tissues of the neck and chronic injury, the patient can neck stiffness and pain, part of the patient due to inflammation stimulation of the skin nerves can appear dizziness, headache symptoms. The stiffness and pain on both sides of the neck may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.