Signs of latent TB becoming active

Chest symptoms are common when the lungs are affected, but tuberculosis can also affect other organs. Swollen glands, ongoing pain, or unexplained symptoms in another body area need assessment, especially after known exposure or a previous positive test.

Latent TB means tuberculosis bacteria are present but contained, so the person is not ill from active disease and does not spread TB through ordinary contact. Active tuberculosis means the bacteria are multiplying and causing illness; lung disease can be infectious through the air.

Symptoms can resemble influenza or another chest infection, so they cannot confirm TB on their own. A clinician may use Tuberculosis Screening, chest imaging, and laboratory testing to determine what is happening.

Contact a healthcare service promptly if you develop a persistent cough, fever, night sweats, unexplained weight loss, or coughing blood after a TB exposure or latent infection diagnosis. Mention travel, household exposure, immune conditions, pregnancy, and any preventive treatment you have taken.

Follow infection-control advice while active disease is being considered, such as avoiding close indoor contact if instructed and covering coughs. Do not stop or restart TB medicines without the prescribing team; antibiotic treatment requires a planned course and monitoring.

Seek emergency help for coughing a large amount of blood, severe breathlessness, blue lips, fainting, or confusion. A new cough with fever and marked weakness also warrants prompt medical advice, particularly in someone with a weakened immune system.

If you have no symptoms but have been told you may have latent TB, keep the arranged appointment. Testing and preventive treatment can reduce the chance of future active disease, and follow-up helps identify medicine side effects early.

Ask which tests are needed, whether you should limit close contact while awaiting results, how to take preventive or active-disease treatment, and which side effects require a call. Ask whether household members or other close contacts need screening.