Eighteen-month-old babies with yellowish skin may be physiological reasons, but also pathological reasons, such as anemia, liver disease and other factors, the specific analysis is as follows: 1. Physiological factors: most babies with yellowish skin may be related to genetic factors, if the parents or immediate family members have yellowish skin, the baby’s skin will also be subject to a certain degree of inheritance. 2. Pathological factors: baby skin yellowish if also accompanied by other complications, we need to be vigilant is disease factors, such as anemia, often accompanied by decreased appetite, pale, etc.; in addition to liver and gallbladder diseases may also lead to yellow skin, such as hepatitis, cholestasis. Eighteen months baby skin yellow, there may be other factors, it is recommended that timely to the hospital for relevant examinations, clear cause after active targeted treatment.