I've been lifting for years and have no history of shoulder injuries. However...
On Monday, my workout wrapped with incline db presses (the last sets using a little more weight than I should have) and chins, 10x4 for both. Later that night, just reaching for some papers on my dining room table, I had a very sharp ache in my left shoulder, running midway down my upper arm. It wasn't acute exactly, but a very uncomfortable ache, almost numbing, that faded to a rather dull pain within ten minutes or so.
The rest of that night, Tuesday and today have been marked with a mild discomfort in my shoulder, mostly but not exclusively at the bottom of my deltoid around the medial head, where it intersects my biceps and triceps. I have a full range of motion, it's just rather tender.
I start a new softball league in three weeks and pressing my way to a shoulder impingement sounds like a bad way to start the season, so I've opted to take the week off from lifting (I'm beat anyway) and take anti-inflammatory meds, with the intent to resume next Monday without any overhead pressing.
Any opinions on the matter would be aprpeciated, in terms of diagnosis and recovery. I presume it's no big deal, but a friend of mine needed rotator cuff surgery due to a lifting injury, and I figure better safe than sorry. I used to do upright rows, painlessly but with Rice Krispie sound effects in my left shoulder, so here's hoping I'm not heading towards the O.R. myself