I have been wearing a tens unit for lumbar back pain with some benefit involving my leg pain ? is the tens unit good to use all day ? help

See below: You can use it all day. I have found overall that the benefit of tens wears off over time.

TENS: Tens unit can be used for varying duration of time and it is best discussed with your prescribing physician. Currently, there is controversy around the use of tens unit for lower back and leg pain - reports are that it does not work. On going research will hopefully determine the validy of the tens unit for lower back pain.

TENS unit: If you suffer severe and intractable lower back pain with pain, numbness and tingling radiation down to your legs as a result of a lumbar disc herniation or severe spinal stenosis, tens unit won't help. Tens unit is designed to provide temporary pain/muscle spasm reliefs. If you have used tens for an extended period of time & the pain won't go away, you should consult a spine surgeon immediately.