People blush when they get nervous.
As someone who suffered with hyperhidrosis and facial blushing for 20 years, I know how these statements can hurt. Usually they are said right after you explain all of the effects that sweating and blushing have had in your life. I think maybe people say this to make you feel like you are normal and nothing is wrong. Here is an abbreviated version of my story. I began noticing excessive sweating while I was in junior high.