Scleroderma is a chronic autoimmune disease that affects the skin and connective tissues. It causes the skin to become thick and hard due to an overproduction of collagen, a protein that provides structure and support to tissues. Symptoms can vary widely and may include swelling, pain, and changes in skin color. There are two main types of scleroderma: localized and systemic. Localized scleroderma primarily affects the skin, while systemic scleroderma can impact internal organs such as the heart, lungs, and kidneys. Early diagnosis and treatment are important for managing symptoms and improving quality of life.