Why is in attendance a really impossible septic gas smell surrounded by my bathroom? I originally thought the source of the problem was dirty trap hose...

I originally thought the source of the problem was dirty trap hose in the sink because we havent used it surrounded by a long time. I fixed the sink and still am getting the bad odor. I own no idea where on earth it is coming from. We did have problems beside the septic backing up surrounded by November but had it pumped out.
Answers:    If a drain have not been used for an extended interval of time the water surrounded by the trap can evaporate or dry out, causing the odor to come up. Now the subsequent thing you mentioned be the septic backed up and you have it pumped, hopefully it was not approval up because of a bad drain corral, that would cause it to be support up again. If you don't have any marine backing up, next it probably is just a dry drain. Be sure to run the faucets shower and or tubs more frequently.
Good Luck, ;-)
Is the marine level contained by your toilet bowl too low? That will allow sewer gas to enter.