Vomiting with no fever
Sometimes it happens that your child wakes up at night and suddenly he begins to vomit, and you take a thermometer and check the temperature of the child..... but there is no fever. Sometimes, on the contrary, the baby's temperature has dropped. I faced with a similar situation. The first thing to do is to try to calm the child and distract him from what had just happened (for my son vomiting especially at night it is a tragedy.) Then you need to put the child to bed and turn his head to the side so that the child does not choke if the next attack of vomiting will happen.
Then you need to prevent dehydration that is, to give drink to the child in small amounts of water (for babies up to 1 year is 1-2 teaspoons every 3-5 minutes, from 1 to 3 years is 3-4 teaspoons and for children from 3 years is 1 - 2 tablespoons every 5 minutes, but not more than 100 ml in 20 minutes for a child of any age), I do not always give the simple boiled water but glucose-saline solution (I use Rehydron). Instead of water, you can also use little brewed tea or decoction of rose hips. The main thing is not to give a lot of fluids right away it could trigger a new attack of vomiting. And of course call your doctor to rule out an intestinal infection that can do harm to the child and to the others.