Hi and welcome to the Forum! I took the liberty of moving your post to the Tree section, since you had the question about your Japanese Maple. The Intro section is mainly for saying Hi and not everyone takes the time to read them. More people will see it here who might be able to answer your question.
To get a good answer, the more info you can give us, the better help you are likely to receive. To start with where are you located, what zone/ kind of climate. How is your JM situated (full sun, part shade, etc) and how do you care for it.
If you could post a picture, that might be helpful too. Instructions for that are linked in my signature.