Is cleaning baking soda harmful if accidentally ingested?

A small amount of baking soda used for cleaning will not cause discomfort; a larger amount may cause abdominal pain, loss of appetite, dizziness, and convulsions.
Baking soda is the common name for sodium bicarbonate. A small amount of baking soda is quickly neutralized by stomach acid and usually does not cause discomfort; a large amount of baking soda exceeds the neutralization capacity of stomach acid and the weakly alkaline baking soda may cause damage to the gastric mucous membrane, resulting in symptoms of indigestion such as loss of appetite, nausea, vomiting, abdominal pain, and so on.
A large amount of baking soda will react with stomach acid to generate more carbon dioxide, which may cause metabolic alkalosis. The manifestations of metabolic alkalosis include restlessness, excitement, sleepiness, spasms of hands and feet, and coma in severe cases.
The emergence of maladaptation timely consult a doctor to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor.