Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
If home observation is recommended and the person remains well, routine emergency-department testing may not be necessary.
And for anyone, someone who:
Seek urgent reassessment if new or worsening symptoms develop, including repeated vomiting, severe chest or abdominal pain, drooling, difficulty swallowing, blood in vomit or stool, persistent coughing, fever, or breathing problems.
New trouble swallowing in the days or weeks after an injury also needs medical review because it may signal scar-related narrowing.
After an eye exposure, ongoing pain, redness, light sensitivity, or blurred vision should be evaluated promptly rather than left for a routine appointment.
Close the dishwasher dispenser and package immediately after use.
Handle packets with dry hands, and do not transfer detergent to food or drink containers.
Routine follow-up may be recommended after a significant burn, aspiration injury, or hospital stay.
Depending on the injury, this may involve a primary care clinician, gastroenterologist, lung specialist, or ophthalmologist.
The article also says
Follow the observation instructions given by the poison center or treating clinician.
To reduce another exposure, keep dishwasher detergent in its original closed container and store it locked, up high, and out of sight.
Every sign above is quoted from the sofidex article on Automatic dishwasher soap poisoning. If you are not sure, err upward — it is always reasonable to be checked.