Restrictive lung disease is a condition that causes a decrease in lung function resulting in difficulty breathing. Other terms that can be used to describe this condition include restrictive ventilatory disorder and interstitial lung disease. Some cases of restrictive lung disease may also be referred to as pulmonary fibrosis, which is characterized by the scarring and thickening of the lung tissue. Additionally, chest wall disorders such as kyphoscoliosis and neuromuscular diseases such as muscular dystrophy can cause restrictive lung disease. Despite the varying causes, the common symptom of limited lung function remains, making it important for individuals to seek medical attention to manage their condition and improve their quality of life.