Originally Posted by chrisg

You MUST get this kitten to a Vet as soon as possible. If there are no appointments, explain to the receptionist and they will fit you in.
Please DON'T wait.

Kittens get dehydrated very quickly and also suffer from stress. Make sure there is plenty of room temperature drinking water available.

The problem could have different causes and your Vet is the best person to consult.