Which symptom is not commonly associated with tuberculosis (TB)?

The symptom that is not commonly associated with tuberculosis (TB) is severe headache. Tuberculosis primarily affects the lungs and its symptoms are often respiratory or systemic in nature. The hallmark signs of TB include a persistent cough lasting more than three weeks, weakness or fatigue, and night sweats.

A persistent cough is characteristic of pulmonary TB, where the body's effort to expel the bacteria often manifests as a long-term cough. Weakness or fatigue is a general symptom due to the body's response to the infection, as it diverts energy to fight off the organism. Night sweats may occur due to fever and the body's metabolic response as it tries to regulate temperature during an active infection.

While severe headache can occur in some cases, particularly if there is extrapulmonary TB or meningitis involvement, it is not a defining or common symptom of TB, thus making it the correct choice in identifying which symptom is not typically associated with the disease.