2 and a half year old baby hands and feet yellow may be physiological factors, but also may be the manifestation of certain diseases, such as liver lesions, malnutrition, etc., should be timely consultation to identify the cause of the disease. 1. Physiological factors: short-term intake of large amounts of food containing carotene, such as carrots, oranges, etc., resulting in a large amount of carotene in the body’s blood, triggering changes in skin color and urine color. This is a normal phenomenon and parents do not need to worry too much. 2. Pathologic factors: (1) Liver lesions: the body can not be excess impurities out of the body, but also can not be excess bilirubin out of the body, gathered in the body, triggering jaundice, so it will cause yellowing of the hands and feet. (2) Malnutrition: If the baby is severely malnourished, not only the hands and feet will be yellow, especially the facial skin will also be yellow. As this symptom alone cannot determine the disease, it is not excluded that it is caused by other factors. It is recommended that the patient consult the doctor in time, ask the doctor to clarify the cause of the disease, and give targeted treatment.