The symptoms of paint thinner poisoning can vary according to the type of toxic hydrocarbon that enters the body. The amount and the route of entry also influence the type and severity of symptoms. Problems in the digestive tract may include a burning in the mouth, throat, or stomach; vomiting; or diarrhea. The victim may develop a persistent cough, become short of breath, or even appear blue around the lips and extremities. Someone who has absorbed a large amount of a certain type of hydrocarbon could be hard to arouse, lose consciousness, or have seizures.