Inclusion Criteria:  all consecutive patients> 18 years of age who are operated on at the hand surgery clinic Södersjukhuset for elective or emergency surgery that do not meet any of the exclusion criteria.  Exclusion Criteria:  -The researcher has an age <18 years. Patients with known healing problems in the past, for example patients with burns or during cortisone treatment. Patients undergoing surgery where skin grafting occurs. Patients with acute injuries that include a traumatic wound-ie what is usually referred to as "open injuries" -where the risk of infection is higher from the beginning.