The following causes are common for hard bags in the cervical vertebrae behind the neck: first, rich bag: if the location is low, it is usually a rich bag caused by local fat accumulation in the 7th cervical vertebrae, with hard texture and painful symptoms by pressing, the patient will have anterior displacement of the superior cervical vertebrae, so there will be incomplete blood supply to the vertebral artery, and the patient will mostly show symptoms such as neck pain, activity limitation and dizziness and nausea. Secondly, cervical lipoma: If the lipoma is large and grows faster, it will also show local hard pack, and there is usually no painful symptom when pressed, and the lipoma can be confirmed by ultrasound examination. Early diagnosis and early treatment can lead to significant relief of clinical symptoms, in which most of the lipomas need to be removed directly by surgery, and pathological histological examination is performed after surgery to confirm the benignity and malignancy of lipomas.