<s>[INST] The rear of my shoulder is aching, the subscapularis muscle it seems like. I m wondering if it s because of a subscapularis tendon micro tear because every time I lift weights the tendon hurts, and then the muscle aches afterwords. Even seems like the trap is aching too. What is this? I know if it s a tear it s not a full tear cause I can still move my shoulder freely without clicking. But when I train, it aches! [/INST] Hi, Pain in shoulder may be due to tear in rotator cuff muscle. But subscapularis muscle comes in front of shoulder and if it is torn pain will be in anterior part. Posterior aspect of shoulder has tears major and minor muscle.  Pain in rear aspect may be due to sprain of this muscle. Local ultrasound of involved shoulder can be done to confirm diagnosis, although MRI of shoulder is more specific for diagnosis. Meanwhile, start tablet Attract twice a day for pain relief. Visit to orthopedic surgeon for detailed clinical examination is recommended.  Hope I have answered your query. Let me know if I can assist you further. </s>