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Why have I been feeling nauseous and dizzy after having influenza B?

May 13, 2025 Source: Cainiu Health
Dr. Ren Yi
Introduction
Influenza B refers to type B influenza. Generally, persistent nausea and dizziness following influenza B may be caused by incomplete recovery, medication side effects, dehydration, hypotension, or dysfunction of the inner ear. Symptomatic management such as general supportive care and medication may be needed. If symptoms are severe, timely medical attention is recommended, and treatment should follow medical advice.

　　Influenza B refers to type B influenza. Generally, persistent nausea and dizziness after type B influenza may be caused by incomplete recovery, medication side effects, dehydration, hypotension, or inner ear dysfunction. Symptomatic management through general care and medication may be needed. If symptoms are severe, timely medical consultation and following medical advice for treatment are recommended. Detailed explanations are as follows:

　　1. Incomplete Recovery

　　After infection with the type B influenza virus, the body requires time to eliminate the virus and recover. During the recovery phase, symptoms such as nausea and dizziness may occur, possibly accompanied by fatigue and loss of appetite. Adequate rest and a balanced diet rich in vitamins and minerals are recommended to aid the body's recovery.

　　2. Medication Side Effects

　　During treatment for type B influenza, certain medication ingredients may irritate the gastrointestinal tract, causing nausea. Additionally, medications may affect the normal functioning of the central nervous system, leading to dizziness, and possibly other adverse reactions such as rash or itching. It is recommended to follow medical instructions when taking medications and avoid adjusting the dosage or discontinuing the medication without guidance.

　　3. Dehydration

　　Type B influenza infections are often accompanied by symptoms such as fever, vomiting, and diarrhea, which can lead to fluid and electrolyte loss, causing dehydration. In a dehydrated state, blood pressure may drop, reducing cerebral blood flow and potentially causing dizziness. Gastrointestinal discomfort may also intensify the feeling of nausea, possibly accompanied by thirst, decreased urine output, and reduced skin elasticity. It is recommended to follow medical advice for the use of medications such as glucose injection, glucose and sodium chloride injection, and potassium chloride sustained-release tablets to alleviate symptoms.

　　4. Hypotension

　　During the course of type B influenza infection and recovery, the body consumes significant energy, which may lead to a drop in blood pressure. Hypotension can cause insufficient cerebral perfusion, resulting in dizziness. Additionally, hypotension may slow circulation in the digestive system, affecting gastrointestinal function and causing nausea. Symptoms such as fatigue, worsening dizziness upon standing, and cold sweats may also occur. It is recommended to follow medical advice for the use of medications such as midodrine tablets, flunarizine hydrochloride capsules, and propranolol hydrochloride tablets for treatment.

　　5. Inner Ear Dysfunction

　　The inner ear is a crucial organ for maintaining balance and hearing. Type B influenza virus infection may damage the structure and function of the inner ear, leading to dysfunction and causing symptoms such as nausea and dizziness, possibly accompanied by tinnitus and hearing loss. It is recommended to follow medical advice for the use of medications such as betahistine tablets, vitamin B12 injection, and cytidine diphosphate-choline sodium capsules for treatment.

　　During the recovery period, it is recommended to ensure adequate rest and avoid sudden changes in posture or head movements to prevent worsening of dizziness.

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