What do I do when my coworkers are harassing me?

If your coworkers are harassing you, you should really tell your boss. Or you could tell your coworkers to stop.

You can ignore them. They are jerks. If they are interfering with your work, or if you how you feel about their actions is interfering with your ability to focus, you should tell them "I do not feel good with you [what they do when they harass you] and that makes it hard for me to focus on my work / want to go to work." If this leads to more harassment, or if you are not comfortable with this, seek out the Human Resources person at your company and discuss the situation with them. If there is no HR person, speak with your supervisor and/or their supervisor about their behavior. Harassment is not acceptable in any environment.

This should always been communicated to a senior member of staff, manager or whoever is senior. Therapy can be used to help overcome any traumatic stress.

Report it first of all, depending on its severity. Personally stand up for yourself by telling them to stop, that you disagree with how they are treating you, and that they are not taking their jobs seriously enough. If you have to, secretly record the behavior towards you so you have actual proof for a boss, or even police.

A good thing to do is report to your superiors regarding the harassment. Every work establishment should have a code of conducts or procedures to make a complaint. Check with your manager or human resources for more information.

First you confront them ask them politely to stop if it's a case where you've already done that going to your HR might be the proper thing to do

You politely make it clear to them that you don't like it, Furthermore you don't participate in any such activities that can give them an idea that you can be joked with. Which includes laughing or taking part in harassment of others.

You could acknowledge the coworker and say you don't feel comfortable with that kind of language. You also could avoid them completely if possible. If you feel comfortable telling your boss that might be the first route. If you don't feel comfortable talking to them then talk to an HR person or a higher up boss.

I suppose it would depend on the harassment. I have been bullied before and I found communication was key. Talking to my co-worker in a calm, professional manner worked wonders. Many times it wasn't about me at all, but it was because they were jealous, had anger issues, or lonely.

Express your discomfort to your supervisor and explain details in a professional manner. It is important to have your personal space respected especially if it is sexual harassment or otherwise.