Spastic squint is a common clinical dystonia, which is a kind of limited dystonia, mainly due to the spontaneous involuntary contraction of sternocleidomastoid, trapezius and other neck muscles, resulting in abnormal posture or movement. According to the survey, the prevalence of spastic dystonia is 5.7/100,000 in Europe, 40/100,000 in the United States, and 8.9/100,000 worldwide, with more female patients than male patients and a male to female ratio of 1/1.2. The peak incidence is 40~50 years old. Spastic squinting neck is mainly manifested by involuntary contraction of neck muscles, increased head and neck movements and abnormal posture, as well as involuntary head and neck twisting, lateral tilting, forward bending and backward tilting, often in different combinations of movement directions and degrees. According to the main position of the head and the direction of movement, spastic squint can be divided into 4 types: 1. Lateral tilting squint The expression of involuntary contraction of the neck muscles leads to the head tilting to the left or right side of the body, and in heavy cases, the ear, temporal and shoulder are close to each other, and the phenomenon of ipsilateral shoulder lifting is mostly present. Muscle groups involved: sternocleidomastoid, cephalic, cervical and scapular muscles on the flexor side. 2.Backward tilting type of slant neck is caused by involuntary contraction of neck muscles, resulting in head tilting back and face tilting up. Involved muscle groups: bilateral head, cervical pinch muscle, head, cervical semispinal muscle and multifidus muscle. 3, anterior oblique neck The involuntary contraction of the neck muscles causes the head to be flexed toward the chest. Muscle groups involved: bilateral sternocleidomastoid muscles, anterior oblique muscles. 4.rotation-type squinting neck is caused by involuntary contraction of neck muscles, resulting in head rotation to one side of the torso, which can be divided into two types of muscle contraction: cervical muscle spasm and clonus. The muscles involved: head pinch muscle, neck pinch muscle and contralateral sternocleidomastoid muscle on the side of face rotation. The treatment of spastic squint is based on oral medication, botulinum toxin injection and surgery, and also includes some other treatment methods. 1.Oral drug therapy Oral drug therapy has its limitations, and the main drugs include benzhexol, benzodiazepines and tetrabenazine. At present, oral medication has limited improvement on patients’ symptoms and the efficacy is poor. 2.Rehab physiotherapy includes biofeedback therapy, wearing neck brace and so on. Physiotherapy helps to relieve the symptoms of some patients, such as improving disability and relieving pain. 3.Local injection of botulinum toxin Botulinum toxin is a neurotoxin produced by Clostridium botulinum, which acts on the zinc peptide endonuclease of motor nerve endings at the neuromuscular junction. Its a safer treatment, but there are potential side effects associated with its use, including muscle weakness, dyspnea, local bruising, dry mouth, and flu-like symptoms that resolve on their own in most patients. 4.Cervical spinal nerve combined with parasympathetic nerve block Mainly for the treatment of lateral flexion type and rotation type spastic oblique neck, the corresponding cervical spinal nerve and parasympathetic nerve block are selected to block the transmission of pain and other stimuli, and release local muscle tension and spasm, in order to correct the clonic or tonic involuntary contraction of the cervical muscles and eliminate local pain. 5.Surgical treatment For patients who are not satisfied with conservative treatment, surgical treatment can be considered, mainly including selective peripheral neurectomy, Foerster-Dandy surgery, stereotactic deep brain structure (medial pallidum, ventral and lateral thalamus) destruction, deep brain electrical stimulation (DBS). 6.Low-frequency repetitive transcranial magnetic stimulation A new non-invasive neuromodulation technique, using low-frequency rTMS to regulate the excitability of the direct and indirect loops of the striatum pallidum by using a strong magnetic field generated by transient current to apply the magnetic field to the cerebral cortex, which inhibits the excitability of the local cerebral cortex and affects the expression and release of a variety of neurotransmitters, further leading to a decrease in local cerebral blood flow and metabolism. Eventually, the symptoms of patients with spastic diagonal neck will be improved. 7. Other ways include psychotherapy, motor control training, special life skills training, sensory control, etc. The diagnosis of spastic squint is based on clinical symptoms and signs (excluding secondary dystonia and pseudo-dystonia caused by other lesions). Since this disease not only leads to muscle spasticity pain, but also has a great impact on the patient’s image, which seriously affects the patient’s daily life and leads to physical and mental suffering, it is quite important to take appropriate and effective treatment for it. The treatment of any disease, including spastic dystonia, should be individualized and based on the actual condition of the patient, rather than using a single treatment method to implement a uniform treatment for different cases, which requires continuous improvement in practice to choose the most appropriate treatment plan for different patients.