Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Get emergency help now if you or someone else:
Use your local emergency number or crisis service, or go to the nearest emergency department.
Seek urgent mental health help if you develop new hallucinations, fixed beliefs that others say are untrue, severe confusion, or a sudden major change in behaviour.
These symptoms are not typical of schizoid personality disorder and need assessment.
Consider arranging a routine appointment with a mental health professional if long-term detachment or limited emotional expression is causing problems with work, housing, relationships, or daily responsibilities.
Help may also be useful if you feel lonely, depressed, anxious, or unsure whether another condition could explain what you are experiencing.
A routine review is also appropriate if existing support is no longer helping or if medication prescribed for another condition is causing concerns.
Do not stop prescribed medication suddenly without advice from the prescriber.
Every sign above is quoted from the sofidex article on Schizoid personality disorder. If you are not sure, err upward — it is always reasonable to be checked.