My 2 years old boy is having a hot head and stomach, what can cause that?

Missing information: You can get the most from this site when you provide adequate background information before posting your question. What do you mean by hot head/stomach? If you took a temperature what was it? How long has this been going on ? Are there other symptoms? Have you tried any treatment(s)? You are welcome to start over. Your posts are not linked so each needs to be complete.