Swallowed poisons could include chemicals, drugs, plants, fungi and berries. There are five key signs to look for if someone has swallowed a poison. They may have nausea and vomiting, which can sometimes be blood-stained. Cramping abdominal pain. A burning sensation. They may show a decreased level of responsiveness or… Continue Reading How To Treat Poisoning, Signs & Symptoms – First Aid Training – St John Ambulance