Hi welcome to HCMForum. it is not clear whether he is of nine months or years. nine years means it is commen.
if it is nine months you should be care ful. it may be hole in the atrial septum. or hemophelia. I advise you to
consult a pediatric cardiologist or hematologist
. there after proper investigations diagnise the problem. dont
worry he will be fine. thank you.