The growth of web 2.0 application, consumer feedback about product is analyzed to improve the quality of the product. The consumer feedback or reviews are extracted from the social media and then determine the polarity (positive, negative or objective) is called sentiment analysis. It is also known as opinion mining or appraisal extraction or review mining. The sentiment lexicon plays an important role in sentiment analysis. General purpose sentiment lexicons are not suitable for aspect level or identifying particular domain topics.