I have a small jelly like lump in my lower back and it moves when I try to massage it bur never goes away can it be a tumor?

Get it checked. Just to be sure it is nothing bad, make sure and get it looked at by a doctor; but, more than likely, it is probably a lipoma. These are benign fatty masses, which occur as we age. It could also be an epidermal cyst (these are also caused sebaceous cysts). These are also benign. But, again, get someone to look at it.