Hypomimia, or more commonly known as facial masking is the result of the immobilization of your facial muscles. This condition often leads to a blank expression. Our face displays the emotions we’re feeling. Hence the people we are talking to connects to what we say with the expression on our face. 

But if you have Parkinson’s your face will not exhibit any emotion even if the topic you’re talking about is an emotional one. Fortunately, the focus of Parkinson’s researchers today are on occupational therapy and means to aid people with hypomimia so that they can effectively express themselves for others to understand them.