my son is 3 year 10 months old and his weight is only 12.3 kg only. His always body temperature is 99.4 he eats everything so advise for increasing his weight

A. Mam 99 is fever so if your child is always maintaining a higher temperature you please see with your doctor for the issue that is there and for weight gain you should give all the food whatever is made at home plus plenty of proteins in the diet