How can I tell if my child has a headache?

Very hard to tell. It is very hard to tell if a baby has a headache. We assume babies and toddlers have headaches because we know older children and adults have headaches. We presume that the symptoms children and adults have during headaches are similar to the symptoms babies would have during headaches, such as: cold symptoms, fevers, vomiting, poor appetite, fussiness, tiredness, restless sleep, etc. . .
Headache. Usually babies do not have headaches but if you notice that your baby is him/herself please contact the doctor.