A cohort of pediatric patients undergoing surgery will be followed at the Maternal and Child Hospital October 12, Madrid. The group of patients that develops post-surgical chronic pain and the group that does not develop it will be observed, and risk factors will be studied.~Before the surgical intervention, the risk factors described in the literature will be analyzed. Children will be followed up to 6 months after surgery.
Chronic postsurgical pain had number of prevalence on 20%. Its derivates from risk factors, but recent research provide new potential risk factors to develop chronic postsurgical pediatric pain.~To increase the body of knowledge, an observational study is proposed in pediatric patients undergoing surgical intervention.