What causes sudden dizziness and vertigo?

　　Sudden dizziness and vertigo may be caused by dehydration, lack of sleep, hypoglycemia, cervical spondylosis, Meniere's disease, etc., and can be managed according to different situations. If discomfort occurs, it is recommended to seek medical attention at a hospital promptly and follow medical advice for treatment.

　　1. Dehydration: Dehydration refers to excessive loss of body fluids without timely replenishment, which may also lead to dizziness and vertigo. Dehydration increases blood viscosity, affects blood circulation, especially reduced blood supply to the brain, thus causing dizziness and vertigo. It is recommended to replenish fluids promptly by drinking water or electrolyte-containing beverages, such as sports drinks, to restore fluid balance.

　　2. Lack of Sleep: Long-term staying up late, poor sleep quality, or excessive physical and mental fatigue may all lead to insufficient cerebral blood supply, thereby causing dizziness and vertigo. It is recommended to maintain a regular schedule, ensure adequate sleep each night, create a comfortable sleep environment, avoid overexertion, and take appropriate rest and relaxation.

　　3. Hypoglycemia: Hypoglycemia refers to blood glucose levels below the normal range, which may cause dizziness and vertigo. Associated symptoms: Hypoglycemia may also be accompanied by sweating, trembling, palpitations, anxiety, and other symptoms. It is recommended to immediately consume sugary foods or drinks, such as glucose tablets, fruit juice, or honey water, to rapidly raise blood glucose levels.

　　4. Cervical Spondylosis: Cervical spondylosis may compress the vertebral artery, affect cerebral blood supply, and cause insufficient blood flow to the brain, resulting in dizziness and vertigo. Symptoms may be accompanied by neck pain, stiffness, and numbness in the upper limbs. It is recommended that patients take medications such as chlorzoxazone tablets, eperisone hydrochloride tablets, and sodium naproxen tablets under a doctor's guidance to alleviate discomfort.

　　5. Meniere's Disease: The exact cause of this disease is still unclear, but it may be related to endolymphatic hydrops in the inner ear. During an episode, sudden dizziness and vertigo occur, accompanied by tinnitus, hearing loss, and a feeling of ear fullness. The duration of vertigo is mostly between 20 minutes to 12 hours. Patients may take medications such as diazepam tablets, diphenhydramine hydrochloride tablets, and sodium bicarbonate tablets under a doctor's guidance to improve symptoms.

　　In daily life, it is recommended to maintain a positive and optimistic mindset and engage in appropriate exercise to relieve stress.