Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Follow the discharge instructions from the emergency department or poison center.
These instructions are based on the exact exposure and take priority over general information.
Return for emergency care if a seizure, breathing problem, collapse, severe confusion, or inability to wake develops.
New neurologic symptoms after leaving care also require immediate reassessment.
And for anyone, someone who:
Seek prompt medical advice for persistent vomiting, worsening abdominal pain, increasing sleepiness, or signs of dehydration.
Skin that becomes more painful, swollen, blistered, discolored, or drains fluid should be examined.
Eye pain, light sensitivity, or blurred vision after rinsing also needs urgent care.
Routine follow-up may be recommended to check the healing of a skin, mouth, or eye injury.
A clinician may repeat kidney, liver, or other tests after a substantial exposure.
Most people do not need long-term testing after a minor exposure if a poison specialist has determined that home observation is appropriate and no symptoms develop.
And for anyone, someone who:
The article also says
To reduce the chance of another exposure, keep Campho-Phenique in its original child-resistant container.
Store it locked, out of sight and reach of children, and separate from food, drinks, and oral medicines.
Dispose of outdated products according to local medication-disposal guidance.
Every sign above is quoted from the sofidex article on Campho-phenique overdose. If you are not sure, err upward — it is always reasonable to be checked.