Near-infrared light therapy (NILT) is gaining recognition for its potential in treating traumatic brain injury (TBI). This therapy utilizes specific wavelengths of near-infrared (NIR) light, typically between 600 to 1000 nanometers, which can penetrate the skull and reach brain tissue. Studies have shown that NILT may promote cellular repair, reduce inflammation, and enhance blood flow, aiding in the recovery process. Animal studies and some clinical trials have reported positive outcomes, such as improved cognitive function and reduced symptoms in TBI patients. The mechanism involves the light's interaction with mitochondria, the cell's energy producers, leading to increased adenosine triphosphate (ATP) production and reduced oxidative stress. This cellular-level effect supports the brain's healing processes, making it a promising adjunctive therapy. Ongoing research aims to refine treatment protocols, such as optimal light dosage, frequency, and duration. While current evidence is promising, further large-scale studies are needed to establish standardized guidelines and confirm long-term benefits.