This situation is if you are treated by certain doctors on a regular basis for several weeks or months, and then stop going to any of those medical providers for three months, and start back up.
Lawyers and insurance adjusters called this a gap in treatment. Is there a good reason? When there is a good reason we, as injury lawyers, can deal with this and it's not a case killer, but an unusual lack of medical care and then a resumption of the care needs to have a rational reason or the insurance adjuster will try to claim that none of the care after the long gap is really related to the car accident injury.
The insurance adjusters try to scour the medical records and other records to try to claim that some part of the medical care has nothing to do with the car accident case even without a major gap in care.