Contact dermatitis (CD) is a common health problem, which affects both men andwomen and accounts for 85-90% of all skin diseases. Two main types of contact dermatitiscan be distinguished, according to the pathophysiological mechanisms involved, i.e. allergicand irritant CD. Allergic CD (ACD) requires the activation of antigen specific (i.e. acquired)immunity leading to the development of effector T cells, which mediate skin inflammation[1,2].