Byssinosis, also known as Brown Lung, is a type of occupational lung disease caused by the inhalation of cotton, flax, hemp, and other plant fibers. It is most common among those who work in the textile industry, such as weavers, spinners, and those who operate machinery. Symptoms of the disease include coughing, chest tightness, wheezing, and shortness of breath. In extreme cases, byssinosis can cause permanent damage to the lungs, resulting in decreased lung function. Treatment typically involves avoiding exposure to the fiber dust and, in some cases, taking medications to reduce inflammation.