Neuromodulation is the process of regulating nervous system activity by directly stimulating specific brain areas, nerves, or the spinal cord, often using electrical or chemical agents. This technique alters nerve activity to achieve therapeutic effects for various conditions. These include chronic pain, movement disorders such as Parkinson’s disease, epilepsy, and major depression. Neuromodulation can be targeted and specific, allowing for the modulation of neural activity in precise areas, thereby minimizing side effects compared to systemic treatments. Techniques range from deep brain stimulation (DBS) and spinal cord stimulation (SCS) to vagus nerve stimulation (VNS) and transcranial magnetic stimulation (TMS). As a rapidly evolving field, neuromodulation holds promise for treating conditions resistant to conventional medical therapies.