Severe vertigo and vomiting may be caused by vestibular organ diseases, vertebral artery cervical spondylosis, cardiovascular and cerebrovascular diseases. 1. Vestibular organ disease: if the patient has Meniere’s disease, otolithiasis, vestibular neuronitis and other diseases, it may lead to severe vertigo and vomiting. 2. Vertebral artery cervical spondylosis: If the patient suffers from vertebral artery cervical spondylosis, it will easily lead to vertebral artery compression, causing insufficient blood supply to the vertebral artery, resulting in severe vertigo and vomiting. 3. Cardiovascular and cerebrovascular diseases: when patients have cerebral hemorrhage, cerebral vascular sclerosis, insufficient cerebral blood supply and other diseases, it may lead to dizziness, vomiting and other symptoms. When patients experience severe dizziness and vomiting, they should immediately go to the hospital for consultation, clarify the cause of the disease and then under the guidance of the doctor to carry out the appropriate treatment, so as to avoid delaying the condition.