I dare not complain

I could hear her groaning outside my bathroom stall. She told a young woman she was sorry about the noise and the answer which came back was about whether she needed help.

Later as I washed my hands I saw the woman, maybe 10 years my senior, hunched over the metal sink in pain and barely able to wash her own. I asked what was wrong. 

"My back hurts. I had surgery and they put metal rods in it" 

I told her I was very sorry and had no current comparison to offer. My lower back has been experiencing some minor issues of late but I dare not mention it. 

I have nothing to complain about.