Hi,thanks for query.The problem is not between the thighs,it is between ears.Means it is the anxiety
that is causing this and this is the way you have find to relieve your self.Please talk to psychiatrist
and take his opinion on this.You need counseling and treatment if required.Try yoga and meditation
this will help to increase mind power and help you to fight stress
.Keep confidence in your self.
wishing you good health.