Dizziness, nausea and weakness may be caused by low blood pressure, cervical spondylosis or insufficient cerebral blood supply. 1. Hypotension: When the patient’s blood pressure is lower than normal for a long period of time, it may cause hypotension, during which the patient may suffer from dizziness, nausea, weakness and other symptoms, and in severe cases, coma may also occur. 2. Cervical spondylosis: prolonged work may cause cervical spondylosis, cervical spine compression by diseased tissues may affect the nerve function, the patient appears dizziness, nausea, weakness and other symptoms. 3. Insufficient cerebral blood supply: cerebral infarction or atherosclerosis can affect the blood supply to the brain, causing insufficient cerebral blood supply, which affects the normal function of the brain, and can also make the patient experience dizziness, nausea and weakness. Dizziness, nausea and weakness may also be caused by gastrointestinal diseases or excessive pressure, etc. It is recommended that patients go to the hospital for consultation.