What are the symptoms of Type A and Type B influenza, respectively?

Feb 14, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Under normal circumstances, "Jia Liu" refers to Influenza A, and "Yi Liu" refers to Influenza B. Symptoms of Influenza A include high fever, respiratory symptoms, general body aches, gastrointestinal symptoms, and extreme fatigue. Symptoms of Influenza B include fever and chills, respiratory symptoms, general body aches, cold sweats and sensitivity to cold, as well as gastrointestinal symptoms.

Generally speaking, "Jia Liu" refers to Influenza A, while "Yi Liu" refers to Influenza B. Symptoms of Influenza A include high fever, respiratory symptoms, generalized muscle pain, gastrointestinal symptoms, and extreme fatigue. Symptoms of Influenza B include fever and chills, respiratory symptoms, generalized muscle pain, cold sweats and sensitivity to cold, and gastrointestinal symptoms. A detailed analysis is as follows:

1. Symptoms of Influenza A

1. High Fever

After infection with the Influenza A virus, patients typically develop a high fever, with body temperature reaching above 38°C, or even higher. This high fever may last for 3-7 days and is often accompanied by chills or shivering.

2. Respiratory Symptoms

Influenza A patients often experience coughing, which may worsen as the illness progresses. With worsening illness, symptoms such as sore throat, nasal congestion, runny nose, and sneezing may also appear.

3. Generalized Muscle Pain

During the replication and proliferation of the Influenza A virus in the body, a large number of toxins and inflammatory mediators are released. These substances act on muscle tissues, causing muscle pain and fatigue.

4. Gastrointestinal Symptoms

Infection with the Influenza A virus may affect the normal functioning of the gastrointestinal tract, causing hyperemia, edema, and increased secretions in the gastrointestinal mucosa, leading to gastrointestinal symptoms such as nausea, vomiting, and diarrhea.

5. Extreme Fatigue

Infection with the Influenza A virus and the body's immune response to the virus can increase energy consumption, affecting the body's metabolism and nutrient absorption, resulting in fatigue, weakness, and reduced activity capacity.

II. Symptoms of Influenza B

1. Fever and Chills

Patients with Influenza B typically develop fever, with body temperature reaching peak levels within several hours to 24 hours, reaching 39-40°C, or even higher. At the same time, patients may also feel cold and experience chills.

2. Respiratory Symptoms

Respiratory symptoms in patients with Influenza B are relatively mild, but they may still experience symptoms such as coughing, sore throat, nasal congestion, and runny nose. The cough may persist for several weeks, accompanied by dryness and pain in the throat.

3. Generalized Muscle Pain

During the replication and proliferation of the Influenza B virus in the body, a large number of toxins and inflammatory mediators are released. These substances act on muscle tissues, causing muscle pain that affects daily activities.

4. Cold Sweats and Sensitivity to Cold

The Influenza B virus causes an increase in lymphocyte count and a decrease in white blood cell count, leading to symptoms of cold sensitivity in patients. During fever, the body sweats to dissipate heat, making patients feel even colder.

5. Gastrointestinal Symptoms

The Influenza B virus may affect gastrointestinal function, causing hyperemia, edema, and increased secretions in the gastrointestinal mucosa, leading to gastrointestinal symptoms such as nausea, vomiting, reduced appetite, abdominal pain, and diarrhea.

During flu season, if similar symptoms appear, it is recommended to seek timely medical attention and follow the doctor's instructions for treatment. At the same time, maintaining good personal hygiene habits can help prevent the spread of the influenza virus.

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Is dizziness after influenza A a sign of recovery?

Under normal circumstances, "Jia Liu" refers to Influenza A H1N1. Whether dizziness following Influenza A H1N1 indicates recovery depends on the specific circumstances. If dizziness is the only symptom present without other accompanying symptoms, it usually suggests the condition is improving. However, if dizziness is accompanied by other systemic symptoms such as headache, tinnitus, or fatigue, it may not indicate improvement. If any discomfort persists, prompt medical attention is recommended.

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Is influenza A classified as cold-type or heat-type common cold in traditional Chinese medicine?

Influenza A usually refers to Influenza A virus infection. Influenza A is neither wind-cold感冒 nor wind-heat感冒, as these two belong to different medical classifications and should not be confused. Influenza A is an acute respiratory infectious disease caused by the Influenza A virus. It has a sudden onset and is often accompanied by symptoms such as high fever, headache, and muscle aches. The cause is well-defined and the disease is contagious.

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How many days does it take to recover from type B influenza?

The recovery time for type B influenza varies from person to person. Healthy individuals usually improve within 5 to 7 days, while those with weaker immune systems or complications may require 1 to 2 weeks to recover. During infection, it is recommended to eat a light diet, drink plenty of warm water to stay hydrated, and maintain good indoor ventilation. After recovery, one should still keep warm, maintain regular sleep patterns, exercise appropriately to boost immunity, and reduce the risk of reinfection.

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What to do about influenza and chickenpox

To manage influenza and chickenpox, timely isolation and protection, early antiviral treatment, symptomatic relief, enhanced skin care, and immune support are required. Both are infectious diseases, so treatment and prevention must be addressed simultaneously. If persistent high fever, difficulty breathing, or secondary infection of the rash occurs, prompt medical attention is recommended.