Dermatology explains why tattoo pigments remain permanent in the skin

Tattoo pigments remain in the body for decades despite the continuous renewal of skin cells. According to Gudrun Ratzinger, Director of the University Clinic for Dermatology, Venerology, and Allergology at the Medical University of Innsbruck, this occurs because traditional tattoos are injected into the deep dermis rather than the epidermis.

In the dermis, color pigments are absorbed and stored by macrophages, which are part of the cellular immune system. Because these macrophages renew themselves through division rather than being replaced by stem cells from lower layers, the pigment remains trapped in the connective tissue. While the epidermis turns over every few weeks, the dermis provides a stable environment for the ink.

Choosing a professional studio is critical due to the permanent nature of the procedure. Key considerations for selecting a tattoo artist include their specific style—such as fine lines, realism, or blackwork—as well as hygiene standards and portfolio quality. Unlike henna tattoos, which only affect the epidermis and fade as skin cells renew, permanent tattoos are difficult to remove effectively.