5 months baby’s tongue always sticking out can be a normal physiological phenomenon, or it may be a symptomatic manifestation of certain diseases, such as diseases in the oral cavity, intellectual developmental disorders, etc., which require targeted treatment, such as medication and general treatment. 5 months of healthy babies, is in the teething period, accompanied by the root of the teeth itchy feeling, and during this period of salivary gland secretion, easy to cause saliva flow to the corners of the mouth, so the tongue is always habitually stick out, this situation does not require special treatment, with age, slowly will be relieved. If there is inflammation or ulcers in the mouth, tongue sticking out may occur, and it is necessary to maintain hygiene in the mouth and give medication such as amoxicillin if necessary. If there are intellectual developmental disorders, involuntary tongue movement often occurs, need to brain MRI and electroencephalogram and other related examinations, the treatment is mainly based on rehabilitation training. In conclusion, when the baby always appear to stick out the tongue, you need to consult the doctor in time, to clarify the cause of the disease diagnosis and treatment.