Is the pain all the time?
Does running bother it?
Does any specific movement(s) aggravate it?
Are you seeing improvements with PT?
What has your PT recommended?
What have you done?
What results did you see with it?

Have you go to the pain section of the virtual mobility coach and select hamstring?
A few others to check out and there are more.
High Hamstring Gnar, Trigger Points, and Up Stream/Down Stream
Pro Episode # 36 – Voodoo Floss Series # 3: The High Hamstring
Episode 354: Make Your Own Super Floss/High Hamstring & Hip Gnar Gnar
Episode 28: Better Rowing: High Hamstrings Part 1
Episode 28: Better Rowing: High Hamstrings Part 2