Hi, sometime back our kid also had same kind of issue. So I called my doctor office. They suggested us to give children's benadryl every 8 hours about 3.75 ml. Since benadryl is for the age of 4 and above, they suggested only 3.75 ml since my kind was also below 4 years. They asked us to give it for 3 times and if the symptoms did not go away, on call nurse asked us to bring the kid to doctor office. Fortunately everything was fine, so we didn't go to doctor office.