If the odor of the mouth is caused by bad habits, such as consuming heavy-tasting food, not brushing teeth, or brushing teeth in an incorrect way, etc., the symptoms can be relieved by changing the habits and it is not necessary to go to the hospital; however, if the odor is caused by oral diseases, digestive system diseases, or respiratory system diseases, along with other symptomatic manifestations, it is generally recommended to seek medical examination and symptomatic treatment in a timely manner.