What is a generalized symptom of active TB?

Night sweats are a hallmark symptom of active tuberculosis (TB). This symptom occurs due to the body's immune response to the infection. When the immune system works to fight off the bacteria that cause TB, it can cause fluctuations in body temperature, leading to sweating episodes that typically occur at night.

In addition to night sweats, active TB often presents with other systemic symptoms such as fever, weight loss, fatigue, and chronic cough. These symptoms reflect the body's effort to combat the infection and are important for recognizing and diagnosing the disease.

The other choices, while they can occur in various medical conditions, are not characteristic of active TB in the same way that night sweats are. Nausea, headache, and diarrhea can be associated with many different illnesses but do not specifically indicate active tuberculosis. Understanding the common symptoms associated with TB is crucial for early detection and treatment, which can significantly impact patient outcomes.