Earnings season is picking up and  results are driving big share price pop and drops in companies that are beating or missing on forecasts.

Today, ConMed Corp (NASDAQ:CNMD), Quidel Corp. (NASDAQ:QDEL), Neogen (NASDAQ:NEOG), and Vascular Solutions (NASDAQ:VASC) are among health care's biggest movers and shakers.

Source: Vascular Solutions

In the following slideshow, I address the key reasons behind each of these companies surge or purge.