Which sign indicates potential poisoning?

Difficulty breathing is a critical sign that may indicate potential poisoning. Many toxic substances can affect the respiratory system, leading to symptoms such as shortness of breath, wheezing, or a feeling of suffocation. This occurs because poisons may interfere with the body's ability to take in oxygen or may cause an allergic reaction that results in swelling of the airways.

While other signs such as stomach aches, headaches, or skin redness can indeed indicate a range of health issues, they are not as specific to poisoning as difficulty breathing. Understanding that respiratory distress is a sign of significant danger helps responders to assess the situation more effectively and prioritize immediate medical intervention, as compromised breathing can lead to life-threatening conditions if not addressed promptly.