If you have had an issue, found a solution and then blogged about, then you can also self answer your own question. It's perfectly valid and actively encouragedIt's perfectly valid and actively encouraged by StackOverflow/Exchange.
Be sure the question you are asking is a question, and not just a statement. It should be posed as a question that others would also be able to answer, your solution after all may not be the only one or the best solution and other people need enough information to be able to answer it.