Figure 4
Comparison of the frequency of painful days before and after treatment belonging to the group received injection of lidocaine hydrochloride 5 times. A significant decrease in the frequency of painful days after treatment (2, 4 and 6 month) compared to pre-treatment was observed P < 0.001). 2., 4. and 6. Months after the treatment, there was no difference between the frequency of painful days (P > 0.005).