Abstract: Tuberculosis can be clinically classified briefly into three major types: primary tuberculosis, also known as childhood type tuberculosis. Blood-borne disseminated tuberculosis. Secondary tuberculosis, also known as adult-onset tuberculosis. TB is also clinically divided into four stages according to the stage of TB lesion development. Tuberculosis can be clinically classified into three main types: 1. Primary tuberculosis, also known as childhood tuberculosis. 2. Blood-borne tuberculosis. 3, secondary tuberculosis, also known as adult-onset tuberculosis. Clinically, TB is also divided into four stages according to the stage of TB lesion development: 1, infiltrative stage or progressive stage. 2. Dissolution and dissemination stage. 3. Resorption and improvement stage. 4. Calcified hard nodules stage.