Hey HALO -
I found the definition of Hill-Sachs Lesion:
A radiographic sign of a recurrent dislocation of the shoulder
Although the answer was hesitant, looks like it was the correct one. From the pain you are describing as well as the circumstances surrounding your shoulder, it sounds to me like you have the beginnings of Osteo Arthritis (OA) in your shoulder. OA has at times been diagnosed as the "wear and tear" arthritis... Basically you over work a joint and it gets angry and fights back.
Are you taking anything for the pain? I don't know if you can take it or not, but Aleve may provide some relief for you. Also if you take MSM, Glucosamine and Flax Seed Oils, they are supposed to help. I have heard both positive and negative stories about those supplements.
I would talk to your doctor about the pain/swelling/and weather intolerance you have in your shoulder and see what they say. Good luck, and let us know what happens!
Take Care - Duck
Confirmed Diagnosis of - Psoriatic Arthritis/Spondylitis/Graves Disease/GERD/Scoliosis/Hiatal Hernia/Graves Disease of the Eyes/Chronic UTIs
Current Meds - Enbrel/Prevacid/Synthroid/Nitrofurantoin
Past Meds - Inderal/PTU/Prednisone/Voltaren/Feldene/Mobic/Cortisone and Steroid Shots
Additional Supplements - Multi-Vitamin/Bromelian/Acidophilus/Green Tea