 [ Symptoms ] i have a brown blotch about 3 in circumference that appeared near my belly button and it is getting bigger any ideas  have a brown blotch by belly button size of a dollar coin appeared in the last 6 mos about the size of a quarter does not itch no fever not raised any ideas my concern is that it has gotten bigger and continues to do so i just want to know if there is reason to be concerned [ Disease ] maybe but you will need to address this problem with your baby is pediatrician    someone who knows her and her medical history this issue is always a challenge for parents traveling with babies some have used benadryl but i am not a big fan of doing this since this medication which will make adults sleepy can result in a paradoxical effect in children in other words it could cause her to be stimulated like you gave her coffee you do not want a wild and stimulated baby on a nine hour flight talk to the pediatrician