Who knows. Get to a doctor if it's been going on for any length of time (more than a couple days) and make sure he's got plenty of water
My Son Has A High Fever, Coughing, Bloodshot Eyes, Weak, Throwing Up, Loss Of Appetite, Pain In His Back What Is This?
Something to check out by a doctor. He may have an reaction to something he could eat or swallowed
There is a very bad flu out there this year. You need to get him seen before he dehydrates to much. With the throwing up that will happen quickly in a child. He needs blood work done.