One additional thought…I did get two cortisone shots in the bursa sac in my knee. The inflammation there was so deep that no amount of icing was gonna reduce it.
The cortisone shots gave me temporary relief and allowed me to keep training (my issue was running). It did not however solve my problem…rather, it alleviated a symptom. I continued to train but spent the earlier-mentioned time to properly address the root cause of my problem (weak glutes).