We all have them. By nature, many of us are helping, giving people. We like to lend a hand, even when both of ours are tied behind out backs. We need to cultivate a sense of enlightened self-interest. Otherwise we overextend ourselves when we feel well, and then we crash.
Physical imbalance is also a perpetuating factor.
Perhaps you were born with one leg shorter, or one side of the pelvis smaller. You could have short lower legs, so that most chairs automatically cut off the circulation of the hamstring muscles. Imbalance can come with age, as we lose teeth, or our body wears down unevenly. Be sure that you and your physical therapist consider both sides of the body when doing stretching and bodywork. You may have active TrPs on one side of the body only, but both sides need work.