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 possible heart attack symptoms, such as persistent chest pressure or tightness, pain spreading to an arm or jaw, sweating, nausea, or shortness of breath.
Also call emergency services for possible stroke symptoms, including sudden facial drooping, arm weakness, speech difficulty, loss of vision, severe imbalance, or confusion.
And for anyone, someone who:
Contact a healthcare service promptly if you develop severe unexplained muscle pain or weakness while taking cholesterol medicine, especially with fever, marked illness, or dark urine.
Do not wait for these symptoms to pass.
Arrange routine follow-up if a blood test shows high cholesterol.
This is usually not an emergency.
Follow-up can confirm the result, look for a cause, assess your overall cardiovascular risk, and discuss treatment.
Seek a timely appointment if you have a strong family history of early heart attack or stroke, visible tendon deposits, or relatives with familial hypercholesterolaemia.
These features can suggest inherited high cholesterol.
Every sign above is quoted from the sofidex article on High blood cholesterol levels. If you are not sure, err upward — it is always reasonable to be checked.