Vanathi Srinivasan blamed the police for remaining "mute spectators" during the attack.
BJP candidate for Coimbatore South Assembly constituency was allegedly attacked today by AIADMK workers.
The incident took place when Vanathi Srinivasan was getting into her car after attending a funeral, police said.
A gang armed with sickles and iron rods attacked her and she sustained injuries on her hand though BJP workers accompanying Ms Vanathi tried to protect her. The window panes of the car were also damaged.
The attackers fled the scene after the incident.
Later, Ms Vanathi left the spot in another vehicle.
A few BJP workers, who suffered injuries were admitted to the government hospital, they said.
Ms Vanathi blamed the police for remaining "mute spectators" during the attack and said she would lodge complaints with the District Collector and Police Commissioner.
"AIADMK is afraid of sure defeat in the constituency and was indulging in such activities to scare the rival candidates and voters," she said.
Meanwhile, AIADMK candidate representing Coimbatore South Amman Arjunan also lodged police complaint, alleging BJP workers resorted to violence and beat up their party cadres.
The complaint stated that the ruling party workers had only objected to Ms Vanathi entering into a prayer hall, where a condolence meeting was being held and canvassed for votes.
The argument led to BJP workers attacking AIADMK activists, the complaint said.
Some AIADMK workers were injured in the attack, necessitating hospitalisation, party sources said.