Melatonin Cream Against Acute Radiation Dermatitis in Patients With Early Breast Cancer

Inclusion Criteria: * Diagnosed with early breast cancer * Over 49 years old * Have had radical tumor resection surgery * Follows treatment regimens and follow-up at Rigshospitalet * Written informed consent after written and verbal information Exclusion Criteria: * Inability to understand Danish, written or spoken * Mental illness (Defined as having a diagnosis and being in medical treatment, or if anticipated poor compliance) * Previous therapy with ionizing radiation in the thoracic or neck area * Use of bolus for radiation therapy (A bolus is a material which has dose absorption properties equivalent to tissue. It is placed on the irradiated area to alter dosing or target of the radiation therapy) * Pregnancy