The extent of Abel's injury won't be clear until the team provides further updates about any imaging taken on the arm, but right away, one must worry about a long-term absence. Inflammation isn't an injury in itself; it's a symptom of fatigue and/or damage, which has some cause. Finding out the cause of the inflammation will tell us whether Abel will be out a few weeks, the rest of the season, or somewhere in between.
And that sums it up for now. We just have to wait another day or two (I have no idea how long these imaging tests will take) before we can fully understand the injury. Like everyone else on this site I was very encouraged by Abel's recent starts and looking forward to a great season with him in the rotation. All we can do is wait and hope for the best. The only silver lining to any long-term injury is that it will give another pitcher a chance (Prielipp, Rojas, or even Morris or Zebby?) to make an impression. Not an ideal situation, but like others have said, every team suffers these injury setbacks too.