Working hours should be controlled, his voice, and he needs proper rest time. For example, an honest person must speak in class, because teachers impart his knowledge to students through language. This communication process is very important, because the teacher can't just put his ass on it, just put the video on it, and the students can't understand it, so the teacher must speak during working hours. In this case, in order to give his voice a rest, he should pay attention to the usual speaking time, reduce those as much as possible and describe them.
Pay attention to the intensity of work. People may make a hullabaloo about and go out to sing. This kind of activity will damage our voice. Especially the high notes, he is a great burden to his voice. When he goes outside to sing, his voice had better choose some soothing or deep songs, and don't sing for too long. He may feel very happy at that time, but he will find his voice hoarse when he sings.
Then wake up the next morning, and you find that your voice is different from that of normal people, that is, the kind of pain with a sore throat. He needs some time to recover. At this time, some drugs can be used appropriately, and the pressure on the throat can be relieved by drinking scented tea.