You can be detained under section 2 if:
You have a mental disorder
you need to be detained for a short time for assessment and possibly medical treatment, and
it is necessary for your own health or safety or for the protection of other people.
You can be sectioned for up to 28 days. The sectione can't normally be extended or renewed. But you may be assessed before the end of the 28 days to see if sectioning under section 3 is needed.