Does anyone know of any complications that can arise during puberty?

[Kyrpto]

Does anyone know of any complications that can occur during puberty? (not acne). Its for an assignment and I'm really struggling with this bit! all I keep getting is acne and moodswings! I need something a bit more "physical".

If anyone knows of anything, if you can just give me the name of the condition, I'll research the rest!
Thanks

Early puberty and stopping growth too early?

I know that a bone scan can tell if you have stopped growing or not but I dont know what this condition (too early fusing of end of bones) is called.

this

I was very ill for about 2 weeks before I started my periods. I had nausea and vomiting every time I sat up or walked anywhere. I had no other symptoms and the gp decided it probably had something to do with my changing hormone levels.