Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Biofeedback itself is not expected to cause a medical emergency.
Call emergency services for severe chest pain, major trouble breathing, fainting, stroke-like symptoms, heavy bleeding, or another sudden serious symptom rather than waiting for the biofeedback clinic to respond.
Contact the team during routine hours if you develop persistent skin irritation, increasing pain, dizziness during practice, or difficulty completing the exercises.
Also contact them if an internal sensor causes ongoing discomfort or unexpected bleeding.
Arrange routine follow-up if your symptoms are not improving, are getting worse, or the treatment is affecting your emotional wellbeing.
The plan may need to be reviewed.
Every sign above is quoted from the sofidex article on Biofeedback. If you are not sure, err upward — it is always reasonable to be checked.