Which signs indicate potential poisoning by ingestion?

Ingestion of toxic substances can elicit a range of symptoms that provide clues to the potential poisoning. A burning sensation in the mouth often indicates irritation from a caustic substance, while nausea is a common gastrointestinal response to various toxins. These symptoms suggest that the ingested material may be harmful and require immediate medical attention.

Other symptoms related to poisoning may vary widely and depend on the type of toxin involved. Symptoms like extreme fatigue and confusion can occur in various medical conditions but are less specific to ingestion of toxic substances. Rapid heartbeat and shortness of breath can be signs of several medical issues, including anxiety or cardiac problems, and are not solely indicative of poisoning. Fever and headache might indicate an infection or other illnesses but do not specifically point to ingestion of toxins. Therefore, the combination of a burning sensation in the mouth alongside nausea is the most indicative of potential poisoning by ingestion.