Classically, young people with nodules are in the habit of talking too long, too loudly and with too much effort. Mouth breathing is also potentially drying. Marijuana is more drying than nicotine, and can actually burn the larynx. A simple way of checking for adequate fluid intake is to ensure that urine is pale in colour.
Some young people are more vulnerable to developing vocal nodules and vocal strain than others.
Treatment of voice hyperfunction in the pre-adolescent.