Photothermal therapy is a type of cancer treatment that uses light-absorbing agents, such as nanoparticles, to generate heat and destroy cancer cells. These agents are injected into the body and activated by a laser or other light source, which heats up the targeted tumor cells and causes them to be destroyed. Photothermal therapy is a minimally invasive and targeted treatment option that has shown potential for treating various types of cancer. It is still a relatively new and evolving field of research, with ongoing studies exploring its effectiveness and potential applications in clinical practice.