There are many causes of sudden dizziness and nausea and vomiting, and it is best to first identify the cause. Sudden dizziness, nausea and vomiting often indicate the occurrence of an acute disease and require attention. Common causes are as follows: 1. Acute cerebrovascular disease can lead to dizziness, nausea, vomiting. It is necessary to do brain CT, cranial MRI as soon as possible, so that the diagnosis can be clear. 2. Sometimes dizziness can be complicated by nausea due to inadequate blood supply to the brain due to prolonged inattention to neck posture or a cold and fever. 3. Inner ear inflammation is often complicated by chronic otitis media, mostly due to septic inflammation. This condition can also sometimes lead to dizziness, nausea, and the urge to vomit. 4. Meniere’s syndrome can also sometimes result in dizziness, nausea, and desire to vomit, but sometimes it is also a disease with symptoms of vertigo, tinnitus, deafness, and swelling and pain within the head. Meniere’s syndrome often occurs in the middle-aged population. 5.Sometimes symptoms such as emotional stress, pain, fear, bleeding, sultry weather, fatigue, and emptiness can also lead to dizziness, vertigo, nausea, epigastric discomfort, pallor, and other symptoms. 6. Sudden increase in blood pressure can also lead to dizziness and nausea. You need to go to the hospital as soon as possible after the above situation to avoid delaying the treatment.