There are lots of hormonal
changes which occur in the body of a female during this age.
So, her behaviour & outbursts can be attributed to it.
To rule out any pathological cause, it will be better to get a thyroid
Other reasons for her symptoms can be:
1. Anemia- decrease in blood formation due to deficiency of Iron, Vit B12, Folic acid
2. Stress- either in family or educational matters.
So, kindly consult your Physician and get a proper clinical examination done.
And try talking to her when she is calm and try to find out if she is having any problem which needs to be solved.
There is no need to worry, she will be fine.
Wishing her a good health.