What is osteonecrosis? Your bones are made up of living cells that need a blood supply to stay healthy. In osteonecrosis, blood flow to part of a bone is reduced. This causes death of bone tissue, and the bone can eventually break down and the joint will collapse. Osteonecrosis can happen to any bone, but most often it develops in the ends of long bones, such as the: Thigh bone. Upper arm bone. Less often, the bones of the elbows, ankles, feet, wrists, and hands are affected. When the disease involves part of a bone in a joint, it can

What is epidermolysis bullosa? Epidermolysis bullosa is a group of rare diseases that cause fragile skin that leads to blisters and tearing. Tears, sores, and blisters in the skin happen when something rubs or bumps the skin. They can appear anywhere on the body. In severe cases, blisters may also develop inside the body. The symptoms of the disease usually begin at birth or during infancy and range from mild to severe.

What is Marfan syndrome? Marfan syndrome is a genetic disorder that affects the body’s ability to make healthy connective tissue, which supports the bones, muscles, organs, and tissues in your body. The condition can affect different areas of the body, including: Bones, ligaments, tendons, and cartilage. Organs, such as the heart and lungs. Skin.

What is pemphigus? Pemphigus is a rare disease that causes blistering on many parts of the body, including the skin and the inside of the mouth, nose, throat, eyes, and genitals. In pemphigus, the immune system mistakenly attacks cells in the top layer of the skin.

What are sports injuries? The term “sports injury” refers to the kinds of injuries that most commonly happen during sports or exercise, such as sprains, strains, and stress fractures This health topic focuses on types of sports injuries that affect muscles, tendons, ligaments, and bones. There are several different types of sport injuries. The symptoms you have and your treatment depends on the type of injury. Most people recover and return to normal activities.

What are polymyalgia rheumatica and giant cell arteritis? Polymyalgia rheumatica and giant cell arteritis are closely linked inflammatory disorders. Some people have one of the disorders while others develop both of them. Polymyalgia rheumatica causes muscle pain and stiffness in the shoulders, upper arms, hip area, and sometimes the neck. Giant cell arteritis causes inflammation of arteries, especially those on each side of the head, scalp, and the aorta (the large artery that carries blood from the heart) and its main branches. The main symptoms of this disorder are: Headaches. Scalp tenderness. Jaw pain. Problems with your eyes, which may

What is ankylosing spondylitis? Ankylosing spondylitis is a type of arthritis that causes inflammation in certain parts of the spine. Over time, this inflammation in the joints and tissues of the spine can cause stiffness. In severe cases, this may cause the bones in the spine to grow together, which can lead to a rigid spine that is difficult to bend. Many people with ankylosing spondylitis have mild episodes of back pain and stiffness that come and go. But others have severe, ongoing back pain and stiffness. Other symptoms also may develop if other areas of the body are affected

What is rheumatoid arthritis? Rheumatoid arthritis (RA) is a chronic (long-lasting) disease that mostly affects joints, such as the wrist, hands, feet, spine, knees, and jaw. In joints, RA causes inflammation that leads to: Pain. Swelling Stiffness. Loss of function. Rheumatoid arthritis is an autoimmune disorder because the immune system attacks the healthy joint tissues. Normally, the immune system helps protect the body from infection and disease. RA may cause you to feel unusually tired, to have occasional fevers, and to have a loss of appetite. It also may cause other medical problems in the heart, lungs, blood, nerves, eyes

류마티스 관절염은 무엇인가요? 류마티스 관절염은 손목, 손, 발, 무릎, 척추 그리고 턱 등 관절에 주로 영향을 미치는 만성(지속성) 질환입니다. 류마티스 관절염은 다음과 같은 증상으로 이어지는 염증을 관절에 일으킵니다. 통증. 부기. 뻣뻣함. 기능 상실. 류마티스 관절염은 면역체계가 건강한 관절 조직을 공격하기 때문에 자가면역질환입니다. 보통, 면역체계는 감염과 질환으로부터 인체를 보호하는 데 도움을 줍니다. 류마티스 관절염은 평소와 달리 피로감을 느끼고, 이따금 열이 나며, 식욕을 상실하는 원인이 될 수 있습니다. 또한 심장, 폐, 혈액, 신경, 눈 그리고 피부에 다른 의학적 문제를 일으킬 수 있습니다. 치료를 통해 이 질환을 가진 사람들은 생산적인 생활을 영위하는 데 도움을 받을 수 있습니다.