Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency help for a baby or person with possible CAH who has repeated vomiting, marked weakness, severe dehydration, unusual drowsiness, confusion, a seizure or collapse.
These may be signs of adrenal crisis.
Follow the personal emergency plan, give emergency hydrocortisone if trained and instructed to do so, and contact emergency services.
For someone with known CAH, inability to keep glucocorticoid medicine down is urgent.
Do not wait for severe symptoms to develop.
Follow the written plan and seek same-day advice if the plan is unclear or symptoms are not improving.
A fever, significant injury or planned operation may require stress dosing.
Arrange routine follow-up if there are changes in growth, weight, blood pressure, puberty, periods, acne or body hair.
Also discuss ongoing tiredness, dizziness, fertility concerns or signs of excess steroid exposure.
These changes may mean that monitoring or treatment needs review, but they are not usually emergencies by themselves.
Every sign above is quoted from the sofidex article on Congenital adrenal hyperplasia. If you are not sure, err upward — it is always reasonable to be checked.