muscle tightness, massage, etc.

[JaBlue]

My shoulders and neck are almost always tight. When I do yoga I find it very, very hard to relax them when poses call for it.

I got a deep tissue massage today and felt great and loose for 3 or 4 hours but then tightened up even worse than before. WTF? Also, what can I do to loosen up in general? I stretch/yoga every other day but that is definitely not helping.