In recent years, there has been a dramatic increase in usage and acceptance of online health forums. It has been observed that people are searching their health problem online and posting their symptoms on online health forums. The research hypothesizes that the users may have negative effects on their health by receiving incorrect information about a medical issue from another user. The users relate their symptoms to other users while using online forums because they are incapable to evaluate the authenticity of information. The research will be carried out by selecting online health forum and its data mining will occur by using various machine learning techniques and the data will be evaluated to observe the negative impacts on user’s health.