If he doesn't smoke MJ then you need to focus more on the cause of the false-positive result, not the length of time, which is about three months.
It's a hair test- If you have long hair, the traces of the drug haven't been disposed of, they're locked in the hair follicule. If you have short hair, I don't know how it came back positive.
Depends where he says it came from.... Did he act surprised when you confronted him about it?
yes, i just passed a hair folicle test and i did smoke 2 hits about 60 days ago.
only one of the reasons is that the smoke particles cling to your hair this causes it to smell and its poofs or fizzes because yiur hair and the smoke react.
It doesn't go in your hair unless you smoke it. When you smoke it, it enters your bloodstream and THC ends up getting trapped in the hair follicles. If you've never smoked it, then there's none there.
You have not said positive to what. If you mean drugs then yes, if the child has taken drugs, been breast fed by someone on drugs or been exposed to secondary drug smoke etc.
positive
no
Yes
A hair test will show positive, if you have been using.
No, you must smoke it for it to be stuck in your hair.
Possibly yes. My advice is to never NEVER use drugs or smoke. If you knew the bad and terrible stuff that marijuana can do to you then I would recomend for you not to use marijuana. I shouldn't even explain to you how bad marijuana can do to you or possibly....kill you.....A standard hair test goes back 90 days, but they can go back longer. It is possible for second hand smoke, either because you inhaled or because it got absorbed into the hair, to cause a positive result.