An 'arthroscopic' (key hole) surgery was performed on her and it will take approximately six-weeks for recovery, the hospital said in a release.
She sustained injury to her right knee while getting off from a bus during a 'padayatra' in neighbouring Ranga Reddy district.
Sharmila, sister of YSR Congress chief Jaganmohan Reddy, began a state-wide foot march on October 18 from Idupulapaya, her family estate in native Kadapa district.