If you still feel weak in your legs after almost a month of TB treatment, you need to find out if the weakness is due to TB wasting or if it is due to other causes, such as low potassium or malnutrition. Tuberculosis is a consumptive disease, so it is normal to have weakness in the legs and loss of strength after infection. If you still have weakness in the legs after nearly one month of treatment, further examination is needed. First of all, the examination should be perfected to clarify whether the tuberculosis has improved after one month of treatment, and the improvement is manifested in the improvement of appetite and weight gain, if there is no obvious improvement, the weakness of legs may be caused by tuberculosis, and the treatment program needs to be adjusted. If there is significant improvement in TB after one month of treatment, but there is still weakness in the legs, other causes need to be ruled out. For example, low potassium can lead to weakness of both lower limbs, electrolyte examination can be perfected, and if it is caused by low potassium, it can be treated with potassium supplementation; long-term malnutrition can also lead to weakness of both legs, which requires supplementation of nutrition and active rehabilitation exercises.