Study design: With the use of a special developed shear- force model are we going to administer 20 Newton (2 kg) shear at the palmar side of the under arm in 10 healthy volunteers for 30 minutes. As a control we ware going to put the shear- force model at the other arm without the application of shear- force. Before the use of the shear- force model we will perform cytokine measurements with the use of Sebutape. Sebutape is capable to absorb cytokines from the skin. After the use of the shear force- model we will perform cytokine measurements again. Then we will extract the cytokines from the Sebutape with the use of ELISA.