My son is a 2yr old has loss of appetite, burning fever, and vomit and has not slept all night. wont retain any medicine. should i take him to the er?

At his age, main: Concern is dehydration. While there being re hydrated, simple test can assure you and his doctor as to what the problem may or may not be.

Good idea: If your child is unable to retain flluids, remains with a high fever and is restless and uncomfortable they should probably be seen by a doctor asap. They may be becoming dehydrated, may have more severe illness than you are able to assess on your own, and they may require a detailed exam by an experienced clinician.