Okay, a swelling in that area could be swollen bursa. Sounds stupid that a fluid filled sac that lubricates a tendon can cause that many problems but there are few things that hurt as much as a good case of bursitis. Does it hurt when you lay on that side???
If so, try ice for a couple of days then switch to heat to increase the blood flow to the area to help get the bursa working again. If worse comes to worse, se a doc about a cortisone shot. Clears it up pretty quick.
Mind you, I'm just a bursitis sufferer so I'm guessing. So if it gets worse....see your doc.
gentle hugs...........Jenny