I have been blocked from editing

The main article on this is Wikipedia:Appealing a block.

You can wait until the block expires.

Now might be a good time to take a break from editing Wikipedia and do something else; for example, go to the library. (Remember, though, that you can always read Wikipedia articles, even if you can't edit them.)

Contact the blocking administrator, and/or appeal

If you believe you were wrongly blocked and want to do something about it right now, you have two main routes:

Your first step should be to contact the blocking admin, especially if you believe that the block was due to a mistake or misunderstanding. Go to the user page for the admin you need to contact, and choose "Email this user" from the toolbox on the left-hand side of the page.

Separately, you may seek independent review of the block from another, uninvolved administrator, by appealing the block if you believe the block is unfair.

If you are editing from a school, the school administration may be able to help.

Some blocks affect everyone who is editing from an entire school. School administrators are frequently able to deal with inappropriate use of Wikipedia through enforcement of existing school policies. Once this is done, a school-wide block can be removed upon request from the school administration (if it has not expired on its own); such requests can be sent to info-en-swikimedia.org. This email address is not for requests from anyone other than a school; such requests will either not receive a reply or will be forwarded to the correct address, delaying resolution of your query.