Recurring backups, slow drains throughout the house, or a soggy patch over the sewer line's path are all reasons to look underground before guessing at a repair. A sewer camera finds cracks, collapsed sections, bellied pipe, root intrusion, and offset joints along the run.
There is no first action to take on your end beyond noting when the backups happen and which fixtures are affected, since that detail helps narrow down where the problem sits. If sewage is backing up into the house, stop using water and call rather than waiting for a scheduled inspection.
In Chula Vista, CA, the plumber we connect you with can record the footage and walk through it with you, which is useful for a home purchase, a damage claim, or deciding between a spot repair and full replacement. Call (844) 898-0295 to get connected.