Why should raw onions and garlic be avoided during an upper respiratory tract infection?

Generally, there are several reasons to avoid consuming raw onions and garlic during an upper respiratory tract infection, including irritation of the respiratory mucosa, induction of cough reflex, exacerbation of inflammatory responses, interference with sputum expulsion, and gastrointestinal irritation. The specific details are as follows:

1. Irritation of the Respiratory Mucosa

Raw onions and garlic have strong irritant properties. Their volatile oils and spicy components can irritate the already inflamed respiratory mucosa, causing increased congestion and edema of the mucosa, thereby worsening existing symptoms such as coughing and sore throat. This affects the patient's comfort and delays recovery.

2. Induction of Cough Reflex

The pungent odor can stimulate the nerve endings in the respiratory tract, easily triggering the cough reflex. Frequent coughing not only causes fatigue but also increases pressure within the respiratory tract, which is detrimental to the resolution of inflammation. It may even cause bronchospasm and other adverse reactions, further aggravating airway obstruction and ventilation impairment.

3. Exacerbation of Inflammatory Response

The irritant properties of raw onions and garlic may activate inflammatory cells in the body, leading to the release of more inflammatory mediators, thereby intensifying the inflammatory response in the respiratory tract. This prolongs the duration of inflammation, delays recovery, and may increase the risk of complications such as bronchitis and pneumonia.

4. Interference with Sputum Expulsion

Consuming raw onions and garlic may increase the viscosity of respiratory secretions, making the sputum thicker and more difficult to expel. Accumulation of sputum in the respiratory tract not only impairs gas exchange but also provides a favorable environment for pathogen growth, increasing the risk of secondary bacterial infection and worsening the condition.

5. Gastrointestinal Irritation

During a respiratory infection, the patient's immune system is weakened, and gastrointestinal function may also be affected to some extent. The irritant properties of raw onions and garlic can stimulate the gastrointestinal mucosa, causing gastrointestinal discomfort such as abdominal pain, bloating, nausea, and vomiting. This affects the patient's appetite and nutrient intake, hindering recovery.

Patients with respiratory infections should avoid consuming raw onions and garlic to alleviate symptoms and promote recovery. In addition, patients should follow medical advice for treatment and care, maintaining healthy dietary habits and lifestyle practices.