['mucositis']
['bupivacaine', 'standard treatment (lidocaine viscous solution, morphine, paracetamol, nsaid, gabapentin)']

        Inclusion Criteria:

          -  diagnosed with head/neck cancer and starting radio therapy treatment

          -  age between 18 and 80 years (both included)

          -  able to talk, read and understand Danish

          -  ability to give informed consent

        Exclusion Criteria:

          -  known hypersensitivity towards bupivacaine or other local anesthetics of the amide
             type

          -  pregnancy

          -  women breastfeeding a child
      