Boys should pay attention to the reasonable use of voice, prevent respiratory infections, reduce the intake of stimulating spicy too hard too cold food. 1. Pay attention to the reasonable use of voice: boys in the period of voice change, the vocal cords are in a state of congestion, if you talk too much or too loud, will make the vocal cords edema aggravation, excessive fatigue. Boys should pay attention to the tone of voice, can not talk for a long time or roar. 2. Prevent respiratory diseases: during the change of voice need to avoid colds, pay attention to neck warmth, respiratory infections will aggravate the edema of the vocal folds, if there is an infection of pus will lead to the vocal folds congested adhesion, affecting the development of the vocal folds. 3. Reduce the intake of stimulating spicy, hard and cold food: Reduce the intake of high-fat fried food, spicy food, and as far as possible, do not eat too much cold drinks during the change of voice. If the boy has throat discomfort during the period of voice change, he should immediately consult a doctor to find out the cause and follow the doctor’s instructions for treatment.