Rather than speak from my own experience, I’ll direct you to a few sites to explore. The TL:DR version? It is REAL, it is NOT caused by eating junk food or bad parenting, and you do NOT outgrow it. A friend of mine likes to say that when we hit puberty we get better at adapting so we can have some kind of social life, although that works better for some of us than for others! The first link is about medication, the others are more general.