Yes, human skin can be divided into epidermis and dermis, in which epidermis can be rapidly renewed and shed, while dermis cannot. Pigments in tattoos are usually implanted in the dermis, so they are permanent and will not disappear on their own. So it's not easy to remove tattoos. At present, the commonly used methods to remove tattoos are:

L, laser therapy: the laser is applied to the affected area, and the pigment particles are crushed into tiny pieces and discharged through the skin, or discharged through blood circulation and phagocytosis to complete pigment metabolism. This method does not destroy the rest of the skin tissue, leaving no scars after operation. It is the first choice to treat tattoos at present, but the cost is slightly expensive.

2, chemical corrosion method: it is to use diluted weak acid solution to cause superficial burns on the skin, so that the pigment falls off with the necrotic tissue.

3. Yanuoxiu massage to wash tattoos: use massage to dilute tattoos until the tattoos are completely decomposed.

4. Skinning method: It is to remove the surface layer of skin with a special high-speed rotating grinding wheel to achieve the purpose of removing pigment.

5. Surgical excision: For deep tattoo patterns, the above methods are often ineffective, and only surgical excision and suture can be considered, but spots may be left.