What should I do if I feel dizzy from inhaling too much carbon dioxide?

Nov 25, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Methods to relieve dizziness caused by excessive carbon dioxide inhalation generally include immediately moving to a well-ventilated area, practicing slow deep breathing to regulate respiration, drinking water appropriately, resting quietly, and loosening tight clothing. Quickly leave environments with high carbon dioxide concentrations (such as enclosed rooms or cellars) and go to an outdoor area with good air circulation or a room with open windows to allow fresh air into the respiratory system.

General methods to relieve dizziness caused by inhaling too much carbon dioxide include immediately moving to a well-ventilated area, practicing slow deep breathing, moderately replenishing fluids, resting quietly, and loosening tight clothing. Detailed explanations are as follows:

1. Immediately move to a ventilated area: Quickly leave environments with high carbon dioxide concentrations (such as enclosed rooms or cellars) and go to an outdoor area or a room with open windows where air circulates well. This allows fresh air into the respiratory tract, reduces the level of carbon dioxide in the body, and alleviates dizziness caused by brain hypoxia.

2. Slow deep breathing adjustment: In a well-ventilated area, use diaphragmatic breathing—inhale slowly through your nose for 4–6 seconds, allowing your abdomen to rise, then exhale slowly through your mouth for 6–8 seconds. Repeat this process several times. This breathing technique helps regulate breathing rhythm, increases oxygen intake, promotes carbon dioxide elimination, and improves dizziness symptoms.

3. Moderately replenish fluids: If conscious and without nausea or vomiting, drink small amounts of warm water frequently. Hydration supports blood circulation and helps the body metabolize excess carbon dioxide, reducing physical discomfort due to hypoxia and aiding in relieving dizziness.

4. Maintain quiet rest: Find a quiet and comfortable place to sit or lie down and avoid standing or walking, which could worsen dizziness and lead to falls. During rest, keep the head slightly lowered to reduce the body’s oxygen consumption and improve blood supply to the brain, helping alleviate dizziness.

5. Loosen tight clothing: If wearing tight collars, belts, or undergarments, promptly unfasten or loosen them. This prevents restricted chest expansion and impaired blood circulation, ensuring smoother breathing and better gas exchange, thereby reducing dizziness.

In daily life, avoid prolonged stays in enclosed spaces and regularly open windows for ventilation. If dizziness persists or is accompanied by chest tightness or confusion, seek immediate medical attention to rule out other health conditions.

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