My son has a really high temperature a cough a runny nose and is drooling quite a bit and wont eat or drink anything ?

Fever and drooling : You should control the fever, encourage hydration and see your doctor today.

Doctor: Get the boy to a doctor or emergency room immediately! the child is sick and needs care immediately.

Data missing: With no age or actual fever listed it is hard to provide meaningful advise. What to some is high fever may not be to me. If they have peed/wet within 6 hours they are not dehydrated. Urgency or treatments depend on data not provided.You are welcome to start over.