Invisible braces treatment can move your teeth without the pain and anxiety of other teeth straightening methods. But each new stage of treatment, some people might experience temporary, minor discomfort for a few days in the beginning. This is normal and is typically described as a feeling of pressure. It’s a sign that the invisible braces are sequentially moving your teeth to their final positions. This discomfort usually goes away a couple of days after you insert the new aligner in the series.