Is nebulizer necessary for a coughing toddler?

A nebulizer is typically used for managing asthma. It is a machine that is used to deliver medication to the lungs by converting liquid medication into mist (that can then be inhaled). If the cough is accompanied by wheezing or noisy breathing, it could be a case of asthma. It is best to consult a doctor for proper diagnosis. For dry cough arising from common cold or flu, usually a cool-mist humidifier would help. For more information on the different types of coughs and causes: http://www.parents.com/baby/health/cough/decoding-babys-cough/