Take a look at the following articles Pain the Butt , Hamstring Buttock Pain , and Buttock Hip Pain - Piriformis Syndrome. 

Damien Howell MS, PT, OCS - www.damienhowellpt.com

Hamstring pain doesn't take a long time to heal! Doing the right things can move things along!

If you want to run with the hamstring pain, get a neoprene thigh wrap... that supports the hamstring!

I'm glad you are going to a Massage Therapist! You injured your hamstring, scar tissue formed and FASCIA is "gumming up"- soft tissue dysfunction! There is a technique called Separating the Hamstings and since you are going to a Massage Therapist, ask him to do this for you! You have three Hamstring muscles and should function on their own. But since you injured your hamstring, the FASCIA is gumming them up as one. You lie face down with your foot in the air(forming a 90degree angle). Between the Biceps Femoris and Semitendinous/Semimembranosuos there is a separation. The MT starts at the bottom of the hamstrings, wiggling his fingers between the center of the hamstring while you rotate your foot/lower leg medially and laterally with the knee bent. The binding FASCIA  will release allowing the MT fingers to sink in toward the femur. The MT works his way up the hamstring!

If the massage therapy isn't working for you. I suggest you do GRASTON TECHNIQUE!

www.grastontechnique.com

Go to provider on the webpage..put in your zipcode...and find a provider near you!

Your body will heal as fast as it can if your nutrition, hydration,   circulation and relaxation are optimal, but there are some things that   will slow the healing process down.

When people use ice and NSAIDS like ibuprofen, they are often attempting to suppress nagging pain and    inflammation. Pain prevents you from overusing injured tissue, and    inflammation is the very healing response you seek. In other words, they    are your friends, and suppressing them will slow healing down.

I    ran for nearly five hours Sunday with some nagging pain in my right    hamstring from speedwork I had done earlier in the week, and from    helping a friend move between second floor apartments the day before. It    feels better now from the circulation of the run, because I used it,    but not too hard. It would feel perfect right now if I weren't sitting    on it in front of this darn computer!

Don't fear pain.  It is a mental construct that serves as a rating system  for sensory  information received by the brain. It can be likened to the  color codes  used by Homeland Security and means nothing by itself.  Trust the pain  you feel to direct your attention to the parts of your  body that need  better care or less work, or suppress it at your peril.