The objective of the study is the knowledge of the prevalence of ulcers by pressure in a hospital.A cross-sectional study was conducted using a sample of convenience.The collection of data was carried out using a questionnaire developed and piloted.The data analysis was descriptive and inferential statistics.This study has allowed us to know the current situation about which we assume and implement improvement actions as the dissemination of the obtained data, training professionals, unification of the scale of the risk assessment and improvement of records and re-evaluation of pressure sores.