ROCHESTER, MINN. -- Osteoporosis isn’t the only reason that some people have weak bones. Paget’s disease can cause affected bones to become deformed and more likely to break, according to the December issue of Mayo Clinic Health Letter.

Throughout your life, your body tears down old bone and replaces it with new in a process called bone remodeling. Paget’s disease causes overly rapid bone remodeling, resulting in overly large -- and sometimes weaker -- bone.

Paget’s disease often has no symptoms. For many people it’s discovered during blood tests and X-rays conducted for other medical conditions. When it does cause symptoms, such as bone pain or headaches, medications are available to restore the bone remodeling to a normal pace.