Does the comma come before or after 'however' in a sentence?

It depends on the sentence and how you’re using ‘however.’

I think it depends on the context in which you are using it, however, you should in most cases, use one on each side of the word, just like you are pausing in your sentence. You might be able to find more at www.wiktionary.com Good luck.

If you’re using “however” to indicate a shift in perspective, put a comma after the word. You’ll normally want a semi-colon before “however,” not a comma, in this usage.

i usually do a period—then start the sentence with however.

ex: The medicine helped my cold. However, it did not help my stomach ache.

However, this can be wrong

I would like to suggest this, however there are other alternatives also.

Seems to me, that there are several proper uses to put it in perspective with which context you are using the word.

Bob is correct. The proper way to use it (according to the MLA handbook) is:

“We went to the store; however, it was closed.”

Of course if the sentence is something like this:

“I want to get to Devner however I can.” or “Finish the project however you please.” the usage above would of course not be appropriate.

See dictionary.com for more examles.