It is possible that a user could experience an unexpected illness that is not selected as reporting items.
Implement adding reporting items feature. The button to go to this feature should be in 'Anytime report', and 'Setting' pages, and link to the same page. Once an item is added, 'Anytime report', 'Daily Evaluation', and 'Trend' are updated.
For a newly added item, 'Trend' shows the data after it is added.
Allow adding reporting items/side effects.