On the occasion of World Melanoma Day, which is commemorated on May 23, Hospiten warns of the difficulty of detecting suspicious skin cancer lesions in patients with tattoos. Although they are increasingly common and have a significant aesthetic component, tattoos can have little known health implications, including making early detection of melanomas and other skin cancers more difficult. In addition, tattoo ink often contains chemicals that can cause allergic and inflammatory reactions, and in some cases, even the development of tumors such as lymphoma.