Introduction: bedsore,a commen problem in health centers and hospitals, especially in the wards and intensive care unit. The cost and morbidity for patients and health systems are created. In general bedsores or pressure sores, lesions of the skin and subcutaneous tissue caused by prolonged pressure and are often located in areas where the skin over bony prominence has caused such a hip and heel. This study aimed to learn the causes of its formation and its treatment was conducted. Methods :this study is a review article by searching scientific data bases and websites including Google schooler, Elmnet, SID, Pub med. by keyword, bedsore during the years 2000and 2017 was performed. Results :the results showed that the prevalence of bedsores in health centers and hospitals between 5.3% to 11% and factors such as spinal cord injuries and diseases that cause damage to the nervous system in 85% of cases. Aging (due to thinning of the skin and reduce the power of healing and reproduction), weight loss (due to reduced muscle mass and subcutaneous fat), Poor nutrition and inactivity are causing bedsore also there is significant relationship between the duration of hospitalization and bedsores. Conclusion: hospitalized patients need to continuous and effective care. To prevent bedsore one of the most important factors to prevent bedsores, maintaining healthy skin. The use of vitamins A and D to prevent drying of the skin, topical use of olive oil, bath was in bed with a direct flow of water because increases the blood flow in the body, among the factors that prevent the bedsores also increase knowledge and skills necessary to nurse are an effective role in the prevention of bedsores.