26 months baby can not speak, may be due to physiological or pathological factors, physiological factors such as feeling nervous; pathological factors such as delayed language development, cerebral palsy, etc., can be caused by 26 months baby can not talk. 1. Physiological factors: mainly in the previous can speak normally, behind the lack of babies can not speak, full 2-year-old baby has been able to speak, but may be due to external factors, leading to the baby feel nervous, uneasy, anxious, etc., will lead to its dare not speak. In addition, full 2-year-old baby language development is rapid, the baby may not adapt to the complexity of the expression, there can also be a case of not talking. 2. Pathological factors: when the 2-year-old baby has delayed language development, there will be no speech; in addition, suffering from cerebral palsy, mental retardation, autism and other diseases that affect the baby’s language development, can cause the baby will not speak. 26 months baby can not speak, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.