Connective tissue diseases are increasingly seen in young people. Without effective treatment, the disease progresses — posture may change, pain and irreversible damage occur in the joints, muscles, skin, and most importantly in the kidneys, heart, and lungs, leading to heart failure, kidney failure, and respiratory failure. This results in disability and reduced quality of life. That is why it is so important to consult a specialist as soon as the first signs of the disease appear.