Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for severe breathing difficulty, collapse, seizure, or inability to wake the person.
And for anyone, someone who:
Seek prompt medical reassessment for worsening cough, fever, shortness of breath, repeated vomiting, increasing abdominal pain, persistent dizziness, new confusion, reduced urination, or ongoing eye pain or vision changes.
Lung symptoms can sometimes appear after vomiting and aspiration.
Arrange routine follow-up if symptoms continue, laboratory tests were abnormal, or the exposure happened at work.
An occupational health professional may review ventilation, storage, protective gloves, eye protection, and respiratory controls.
Repeated skin symptoms may require evaluation for irritant dermatitis.
The article also says
After discharge, follow the care team's instructions about fluids, activity, medicines, and repeat testing.
Temporary fatigue, headache, nausea, or throat irritation may take time to settle.
Avoid driving, using machinery, drinking alcohol, or taking nonessential sedating substances until alertness and coordination have fully returned.
To prevent future exposure, keep acetone in its original labeled container.
Store it away from children, food, drinks, heat, flames, and sparks.
Never place it in a cup, water bottle, or other container that could be mistaken for a beverage.
Every sign above is quoted from the sofidex article on Acetone poisoning. If you are not sure, err upward — it is always reasonable to be checked.