When you sing, you feel that you can’t get your breath up, mainly because of factors such as small lung capacity and not being able to use your breath. 1. Small lung capacity: Lung capacity is the amount of gas that can be exhaled at maximum capacity after a maximum inhalation without any time limit. Singing requires a larger amount of gas, and the patient’s lung capacity is relatively small, it is easy to appear on the performance of not being able to breathe. It is common in patients who lack exercise, obesity and some lung diseases. It is recommended to strengthen the exercise, if necessary, go to the hospital. 2. Won’t use the gas: When you sing some very long lyrics, you will not be able to come up for air when you sing them down in one breath. When you sing, you need to pay attention to break the sentence and change your breath in time. You can also learn to use your breath by practicing breath, vocalization and flexible voice control. If necessary, you can go to the Department of Voice Medicine in the hospital. It is recommended to strengthen the exercise, rationalize the use of voice, and master the scientific method of using voice. Go to the hospital in time to improve the examination and follow the doctor’s instructions, so as not to delay the condition.