http://www.acne-web.org/stress-causing-acne/

How much is a 16 year old girl supposed to weigh? Does stress cause acne?
How much you weight depends on your height not your age. An average weight would be about 120-125 pounds, but that assumes that you have an average height of around 5’5″. If you are shorter you can weigh less and if you are taller then you can weigh more. I’m not really sure if stress can cause acne. I think it has more to do with hormones. Lots of teens get acne. Make sure that you wash your face at least twice daily. If that doesn’t seem to help then you might ask your doctor or go to a dermatologist. They can prescribe something to help.
Can stress cause acne? www.highonhealth.org