My baby is 18 month old and he is not eating meal properly it's been almost a week he is not eating properly?

A. Teething could be one of the biggest reasons associated with the same as that can often lead to loss of appetite with a lot of kids you can check for that also sometimes premolars also start to appear in this age so that can also be a reason behind the same so kindly check for these two things and give more of liquid as of now