hi doctor, my baby is very lean , she is active enough but her weight is 10.3 and 3.10 years old. kindly suggest

A. The weight of your child is approximately 4 kg less than the expected weight gain and despite of eating well if your child is not gaining weight then you should consult the doctor as it could be associated with poor digestion or nutritional deficiency which is why your child is not gaining enough amount of weight