Here we have three options to choose from:
Stable - A condition that has been identified, but is neither improving or getting worse. Eg. Diabetes being controlled by tablets.
Worsening - As it says on the tin, this is a condition that has a negative decline on a proposers health. Eg. Cancer that is not curable
Improving - This is a condition that is getting better, and will almost always have no restriction to a license. Eg. High blood pressure that is decreasing due to medication or diet.