5.2 Psychic and emotional condition of the singer
All changes in the body affect the voice. Happy mood, good tone, vigour are a key to a successful singing lesson. The overall tone of a person depends on sleep. It is known that chronic sleep deprivation takes the power and sonority of voice and leads to fatigue. In such a condition, vocal lessons won't be useful. If we have just woken up, our voice cannot sound good. It needs to "wake up." That's why lessons should be started no earlier than an hour and a half after you've got up (although everything is individual in singing). Also important is the psychological compatibility of the student and his teacher, the success of vocal lessons depends on it. This explains long search for a teacher that fits you, transitions from class to class, nervous breakdowns, hidden or shown tears, and "corridor" training.
Food can also have its influence on the voice. It is not advisable to eat food that irritates the mucous membrane spicy and bitter dishes in large quantities, food that is too sweet or sour, burning hot food. Drinking alcohol leads to redness of the mucous membranes, swelling and release of large amounts of mucus. Alcohol consumption can lead to hoarseness. Smoking has similar effect. You shouldn't eat ice cream and drink cold water immediately after singing, because the working muscle tissues are filled with blood and warmed up. Hypothermia can lead to inflammations.
Almost complete ignorance and negligence of many students to their health in general, their voice and the work of vocal apparatus are more and more often in common. Many of them simply do not know that inflammations are not normal. They don't know how they can be prevented.