The effects of bullying and/or harassment should not be underestimated. It can lead to long term sickness and performance issues at work.
Many employees do not want to tell anyone that they feel that they are being bullied or harassed for fear of the consequences. However, the law protects you from being victimised if you complain about these issues.
Harassment does not need to be physical; it can be verbal or even carried out by email or through social media channels. There have been several cases where comments made on Facebook have been found to be bullying or even discrimination.
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Your employer should have an anti bullying and harassment policy to tell you what to do if you feel that you are being subjected to this kind of treatment. They should also have trained all of their staff on bullying and harassment to ensure that everyone knows what kind of conduct is prohibited and the sanctions imposed on anyone who is found to be engaging in this conduct.