The incident occurred in Rudramambapuram village in Chinnaganjam 'mandal' (block) of Prakasam district.
B. Padma (28) was injured in the alleged attack by YSRCP workers on her house. Upset over the incident in which an attacker slapped her, she hanged herself to death in her house.
The incident is suspected to be a sequel to a clash between the two groups in the recent elections.
The incident led to tension in the village. Senior officials visited the village to review the situation.
Parts of the state have been witnessing post-poll clashes between YSRCP and TDP workers for more than a month.
Simultaneous elections to state Assembly and Lok Sabha were held on April 11 while the results were declared on May 23.
Meanwhile, Director General of Police Gautam Sawang asked police force to be alert in view of the current post-poll clashes and upcoming local body elections.
"We still have simmering issues emerging but we anticipate them not to be organized but localized. We will very soon contain them but as long exist they will cause disturbances in society," the police chief told the police officers during the conference of district collectors in the presence of Chief Minister Y.S. Jagan Mohan Reddy on Tuesday.
( With inputs from IANS )