I realized this recently.when i smile for more than 2 minutes, or get embarrassed, or nervous or shy my cheeks start twitching. please help i hate it.

Keep smiling!: When we get self conscious,we become aware of things we don't normally notice about how our body is operating.This can result in muscle tension in our face which makes us feel even more unnatural. We think everyone else notices too,but this isn't often so.It's not unusal to be hyperaware of appearance at 18;the problem disappears as we become comfortable with who we are.Therapy can helpwith this!