One and a half year old baby crying without tears, may be a normal physiological response, may also be congenital abnormal development of the lacrimal gland, dry syndrome and other factors. 1. Physiological reaction: if the baby belongs to false crying, at this time, the cry is only a way to express emotions, there will be no tears, generally no other abnormal reaction. 2. Congenital abnormalities of the development of the lacrimal gland: a congenital developmental abnormalities, such as common lacrimal fistula, lacrimal gland underdevelopment, affecting its innervation, may cause the situation of crying without tears. 3. Dry syndrome: usually associated with non-infectious inflammation of the exocrine glands, prone to dryness of the mouth and eyes, so there may be no tears when crying. A one and a half year old baby crying without tears, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.