Tregs, or regulatory T cells, are a specialized type of immune cell that play a crucial role in maintaining the body's immune balance. They help prevent excessive immune responses that can lead to autoimmune diseases, where the body mistakenly attacks its own tissues. Tregs achieve this by suppressing the activity of other immune cells, ensuring that the immune system responds appropriately to infections without causing harm to the body. These cells are primarily produced in the thymus, an organ located in the chest, and can also develop in peripheral tissues. Tregs are characterized by the expression of specific markers, such as CD4 and CD25, which help identify them in laboratory settings. Their proper functioning is essential for overall health, as they help maintain tolerance to self-antigens and regulate inflammation.