what are the symptoms of dmd
Over time, children with muscular dystrophy can become weaker and weaker, losing the ability to sit, walk, and lift objects. Because the disease can also affect muscles in the heart and lungs, serious heart and breathing problems can occur. There are several different types of muscular dystrophy. Muscle weakness is a hallmark of each type. But the symptoms can vary and start at different ages. Some muscular dystrophies are mild. Others are severe and cause greater muscle loss. Duchenne Muscular Dystrophy. Duchenne muscular dystrophy is the most common and severe form of the disease. It usually starts when a child is between ages 2 and 5. Symptoms of Duchenne muscular dystrophy include: Muscle weakness that begins in the hips, pelvis, and legs; Difficulty standing; Trouble learning to sit independently and walk