Two-month-old babies always eat their hands, it may be a physiological phenomenon, or it may be due to diseases such as xenophagia. 1. physiological phenomenon: due to the age of the two-month-old baby will not be able to use language to express their own needs, so when hungry will appear to eat their hands. Secondly, we also need to consider the baby is currently in the oral period, curious about things around, are normal physiological phenomena, so do not worry too much. 2. Ectophagia: the etiology of the disease is not clear, may be related to nutritional deficiencies, intellectual developmental disorders and other reasons, the typical symptom is that the affected children often eat some non-food things, so the two-month-old baby is always eating his hands may also be ectophagia. Two month old baby always eat hands, there may be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.