While initial reports suggested that the attacked man, who was seen bleeding profusely, was Pushpa's lawyer, police later clarified he was her husband Lingeswara Thilagan, who has been detained for interrogation.
Police said no other person was injured.
AIADMK supporters rained blows on Thilagan, who had stayed put there despite being asked to leave, resulting in bleeding injuries on his nose.
He was rescued by police who removed him from the vicinity for first aid, even as angry men and women were seen swearing at him.
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It was felt that she could even try to contest for the top post.
Pushpa had been reportedly questioning Sasikala's eligibility for appointment as the new General Secretary, a demand being made by a section of party workers.
Party spokesperson C R Saraswathy charged Pushpa with trying to create a law-and-order problem ahead of the General Council.
"Sasikala Pushpa wants to create a law-and-order problem ahead of the General Council tomorrow. Let her resign first as MP as it was Amma who made her a Rajya Sabha Member," she said.
"She (Pushpa) is no more in the AIADMK. In the General Council, only members are allowed and not even special guests are invited," she said.
On the violence, another Spokesperson C Ponnayan said "If someone enters your house and creates problems, there is a consequence-- an action has got a reaction.