Headaches in 4-year-olds may be related to fever, sinusitis, and neurological disorders such as meningitis. 1. Fever: When a 4-year-old child suffers from a cold or pneumonia and has a fever, he or she is prone to headaches, so parents should pay attention to measuring body temperature. 2. Sinusitis: when children with colds or allergic rhinitis caused by sinusitis, headache symptoms can occur because of sinus tract obstruction. 3. Neurological diseases: when their own meningitis, intracranial space-occupying lesions, head trauma, headache symptoms can also occur. As you can see, there are many causes of headaches in 4-year-olds, and parents should pay close attention to their children’s symptoms, and if any discomfort occurs, they should immediately seek medical attention to identify the cause.