Bald spots can be many reasons why you might have them but, before you worry too much, have mom take you to a doctor's office to get checked up 1st, as mentioned, toooooo much bad advise on the web that may have you worrying over many things that might not even be a problem
Make a doctors appointment right away
Hi! I can start by saying not to worry about it, and most important do not try to look for answers in the internet because many people can have the same thing going on and it can be different reasons why. Tell your mom to take you in with your pediatrician or family Dr. and then they'll go from there.
For sure they can help you tell your parents call to the hospital or ask to your doctor to a referral with them...
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