One-third of women over the age of 50 have osteoporosis; 2/3 of women over the age of 80 have the condition. Although the prevalence of osteoporosis is lower in older men than in women of the same age group, there is an equal risk of fatal fractures. Many elderly people believe that osteoporosis is a normal part of aging. In fact, osteoporotic fractures do not occur in all elderly people, and the onset of osteoporosis can be delayed and blocked with comprehensive interventions for risk factors. While there are some causes that cannot be controlled, such as age, female menopause and having a family history, there are many lifestyle-related causes that can be controlled, such as low body weight, low sex hormones, smoking, excessive alcohol consumption, lack of muscle activity, and dietary calcium or vitamin D deficiency. Among them, there are several groups of people who are at high risk of osteoporosis and should pay special attention. Such as thin old ladies, elderly people who do not like to go out and be active, women who are breastfeeding after giving birth, and postmenopausal women. Among them, thin old ladies should pay particular attention because gravity and muscle contraction can affect the function and metabolism of bone cells, and people who are too light weight are prone to osteoporosis. If the elderly feel that they have become shorter or hunchbacked, they should seek medical examination as soon as possible.