The Chief Minister, who was on a two-day visit to Nandigram from where she filed her nomination earlier on Wednesday, alleged that she was pushed by a few unidentified people during her election campaigning.
She was brought to Kolkata's SSKM Hospital by road from Nandigram.
Banerjee sustained "severe bony injuries" on her left foot and ankle as well as bruises and injuries on her shoulder, forearm and neck, according to the report of her initial medical examination.
West Bengal is likely to witness a triangular contest this time with TMC, Congress-Left alliance and the BJP in the fray.
Elections to 294-member West Bengal Assembly will be held in eight phases starting from March 27 with the final round of voting taking place on April 29. The counting of votes will take place on May 2.
While Mamata Banerjee is seeking her third consecutive term, BJP has set a target of winning 200 seats in the 294-member state Assembly. Congress and the Left have stitched the alliance for the polls and had already finalised the seat-sharing agreement. They are also in touch with the Indian Secular Front (ISF), recently floated by influential minority leader Abbas Siddique.
In 2016, West Bengal Assembly elections, out of the 294 seats, Congress had managed to win 44 seats while the Left Front bagged 33 seats. The ruling TMC secured 211 seats and the BJP had won 3 seats.
The BJP made deep inroads in the state in the 2019 Lok Sabha elections winning 18 seats and decimating TMC's tally to 22. Out of the total 42 Lok Sabha constituencies in West Bengal, Congress won two seats, the Left drew a blank.
After BJP's performance in the 2019 polls, several TMC leaders have joined the party. (ANI)