A 7 year antiquated beside severe OCD?

My best friends seven year old sister was diagnosed with a severe baggage of OCD. We all knew she had something wrong near her, she obsesses over everything. If you talk about a bee she will cry, yell, think she hears it, thinks it is on her and hyperventilates. Will this pause up very bad by the time she gets elder? I mean she's only seven and already has this oodles problems!

Answers:

Hopefully she finds a way to deal with it.