The smell of mouth is a satisfactory symptom that is often caused by the negligence of the oral health itself and carelessness. It may be due to general reasons. The smell of the mouth varies according to the time of the day. It is more severe in the morning due to the occurrence of the accident throughout the night. The decrease in saliva during sleep increases the dispersal of residues and waste. Here we should be careful not to sleep unless we clean our mouth thoroughly. The smell of the mouth varies depending on the amount of saliva and the density of germs, as well as by the instinctive state of menstruation in women, as many women who suffer from disorders of the tooth or gum or nasal suffer from a foul taste in the mouth, and smell also occurs in cases of hypoglycemia, Sometimes, the causes are oral, but sometimes the causes may be general as in the diseases of the lungs and respiratory passages, which are less than the oral causes and we can distinguish by making the patient closes his lips and breathes from the nose. Fairway often it is up to the mouth.