We know that the lung tissue of a normal person is like a balloon. When breathing, this balloon expands and contracts, and there are about hundreds of millions of small structures in the lungs like balloons, which we call alveolar tissue. This structure also continuously expands and contracts, expelling carbon dioxide and inhaling oxygen. For certain reasons, such as infection or due to the body shape of tall, thin young people, or chronic obstructive pulmonary disease (COPD) and bronchitis in elderly people, this alveolar structure can rupture, causing some alveoli to merge into a large bulla. Of course, if the large bulla eventually ruptures, the break in this balloon-like surface will leak air into the pleural cavity, causing a pneumothorax. As for the nutrition from food, we believe that patients should not refrain from certain foods, but should instead increase their intake of protein, such as eating three to four egg whites daily. If worried about high cholesterol, discard the yolk, consuming only one yolk per day, but ensuring adequate protein intake. Therefore, for patients with pneumothorax, it is not about avoiding certain foods, but about eating more of those foods to which they are not allergic, such as shrimp and beef, rather than restricting their diet.