My son is experiencing fever (better by: with fluids) (worsened by: dehydration (fluid loss)) (severity: moderate) .

Missing data: Kids get fever. A toddler is expected to get a fever producing illness 5-7 times a year. You have provided no data on amount, duration, effect on activities, ability to take fluids or play. Without background information to better describe the situation and a clear question, you have just made a vague statement. You are welcome to start over.