This is a prospective observational pilot study in which the levels of FXIII and coagulation, anticoagulation, fibrinolysis, endothelial tissue damage and cicatrization are at the arrival of the patient to hospital, 24 hours before the first surgical intervention, 24h After the first surgical intervention, at 7 days after the first intervention and at 30 days after the thermal trauma, in this moment the healing will also be evaluated. All burn patients who meet the proposed inclusion criteria will be included and entered into the Burn Unit of the Vall d'Hebron University Hospital from the start of the study until reaching a minimum of 20 cases or a temporary term of 2 years.