Boric acid is a toxic chemical commonly found in a variety of substances, including roach and ant pesticides, photography chemicals and antiseptics. Exposure to 5,000 to 6,000 mg of boric acid in children or 15,000 to 20,000 mg of boric acid in adults can be fatal, according to the University of Florida. People who develop boric acid poisoning symptoms require immediate attention from a medical professional.
Blue-Green Vomit
The characteristic symptom of boric acid poisoning is vomiting a substance that appears blue-green in color, the University of Maryland Medical Center reports. Vomiting is typically preceded by sensations of nausea and may occur in conjunction with stomach pain.
Diarrhea
People who ingest large amounts of boric acid may experience diarrhea symptoms. Frequent urgent bowel movements that yield runny stools can contribute to sensations of abdominal cramping or bloating. Chronic diarrhea can cause excessive fluid loss, which may increase a person's risk of becoming dehydrated.
Skin Rash
A severe, bright red skin rash may develop across a person's body as a symptom of boric acid poisoning, MedlinePlus warns. Certain people may also develop extensive blistering or peeling of the skin, which can be uncomfortable or painful.
Involuntary Twitching
Involuntary muscle twitching, especially of the face, legs, feet, arms or hands, may occur in people exposed to large amounts of boric acid. Certain people may also experience convulsions or seizures, which can lead to a temporary loss of consciousness or coma.
Fever or Fatigue
Fever or fatigue symptoms may arise in people who ingest high levels of boric acid. A fever is an inflammatory response generated by the body's immune system to help protect it against potential dangers. Fever symptoms may occur in conjunction with skin flushing, sweating, chills or headache. Boric acid poisoning may also cause increased fatigue or drowsiness, which can cause affected people to appear confused, disoriented, sluggish or lethargic.



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