Woke up a few days ago with a pain in my shoulder which I put down to sleeping on it oddly plus doing some repetitive movements at the gym. In the last few days it’s got extremely painful when I try to lift my left arm (I can do it, it just hurts to get dressed or brush my hair etc). Laterally raising it is very tricky indeed. I’m icing it and taking paracetamol which helps a bit. What could this be?! It’s definitely not an a&e issue and dh seems to think that anything tendon/muscle related can only be left to heal alone anyway but I would really like to know what’s happened.