Tuberculosis is a lung-related disease that can be spread relatively easily. Unfortunately, most people who have it are unaware. Many employers require new team members to be screened before they can begin work. We most commonly screen for tuberculosis with a skin test, where we inject a small amount of tuberculin fluid under the skin of your arm, where a tiny bubble forms. This is expected. You will be asked to return in a few days, so we can examine how your arm has responded.