I use marijuana about once a week and only a couple hits at a time and now I need to take a hair test. What are the chances that I pass? I do sweat a lot and I can usually pass a urine test about 3 days after if that helps at all. Im a 190lb 5'10 with blonde hair and medium build

WHy would swearting have anything to do with it? Urine tests are a different beast. THe THC leaves traces in the growing hair based on how much gets in your system, it can't be washed off or flushed out.. AND who smokes "just a couple hits" every week. Why bother at all?

I know recreational users that on light up on the weekends because they want to be sober for the week. With Pot use on the increase with pressure to legalize it all over the place, there are more people who are treating it like alcohol.

That being said, I think this might be more of a habitual use problem and your odds for passing are not minimal but low.

A hair drug test is meant to show consistent use over time. A 1.5 inch sample, cut at the scalp line, will go back 90 days. Since you are not a heavy user my best guess is that you should pass a hair drug test. The amount you sweat, and to some extent your metabolism, don't enter as a factor in hair drug testing.