Help with Repayment on a Student Loan?

I have a student loan in TN that is on reduced payment forbearance and I pay $20.00 per month right now. This is the maximum that I will be able to pay due to other bills. My regular payment is suppose to be around $90.00 per month. With this rate, I will never get this loan paid off, and all the $20.00 goes to is a little bit of interest. Are there any ideas of how to get this paid off or are there any istance programs out there that can get this reduced or forgiven? Thanks.