Invasive techniques refer to medical procedures that involve entering the body, often through incisions or punctures. These methods are commonly used for diagnosis, treatment, or surgical interventions. Examples include surgery, biopsies, and catheterization, which allow healthcare providers to access internal organs or tissues directly. While invasive techniques can be effective, they often carry risks such as infection, bleeding, and longer recovery times. Therefore, healthcare professionals typically weigh the benefits against the potential complications before recommending these procedures. Non-invasive alternatives, like imaging tests or medications, may be considered when appropriate.