The commonly known 'happy gas' is delivered via a fitted nasal mask rests on the nose. Children often feel a sense of well-being or relaxation and sometimes the sensation of euphoria, floating or giddiness giving it the name – ‘laughing or happy gas’. It lowers pain thresholds and may even seem to make time pass slowly. Children sometimes report dreaming and a sense of tingliness in their arms and legs
“General anaesthesia is a controlled state of unconsciousness that eliminates awareness, movement and discomfort during dental treatment.”