What causes sudden dizziness and vertigo?

Sudden dizziness and vertigo may be caused by factors such as hypoglycemia, excessive fatigue, benign paroxysmal positional vertigo (BPPV), anemia, or cervical spondylosis. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Specific analyses are as follows:

1. Hypoglycemia: When blood glucose levels are too low, the brain may not receive sufficient energy, which can easily lead to dizziness and vertigo. This condition commonly occurs after prolonged fasting or intense physical activity. It is advisable to carry high-sugar snacks such as candies or fruit juice for immediate consumption when needed.

2. Excessive Fatigue: Prolonged work or inadequate rest can lead to physical overexertion, resulting in dizziness and vertigo. It is recommended to maintain a regular schedule, ensure adequate sleep, and take appropriate breaks and relaxation time—such as going for walks or outings—to help alleviate symptoms.

3. Benign Paroxysmal Positional Vertigo (BPPV): This condition may be associated with viral infections, insufficient blood supply to the inner ear, and other factors. When affected, otoliths in the inner ear may become dislodged, stimulating hair cells in the semicircular canals and causing brief episodes of vertigo, often accompanied by nausea and vomiting. Patients are advised to take medications such as promethazine hydrochloride tablets, betahistine hydrochloride tablets, or ginkgo biloba leaf tablets as prescribed by their doctor.

4. Anemia: This may be related to insufficient red blood cell count or iron deficiency. Reduced oxygen-carrying capacity of the blood can deprive the brain of adequate oxygen, leading to dizziness and vertigo, possibly accompanied by pallor. Patients should follow medical advice to take medications such as ferrous sulfate tablets, vitamin B12, or ferrous gluconate tablets.

5. Cervical Spondylosis: This is usually caused by degenerative changes in the cervical intervertebral discs or neck injuries. When the affected cervical spine compresses the vertebral artery, it may impair cerebral blood flow, resulting in dizziness and vertigo, often accompanied by neck pain. Patients are advised to take medications such as chlorzoxazone tablets, eperisone hydrochloride tablets, or naproxen sodium tablets under medical supervision to improve symptoms.

In daily life, patients are encouraged to maintain proper sitting posture, avoid prolonged head-down positions, and engage in moderate physical activities such as jogging or playing badminton, which may benefit recovery.