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 if a very high blood pressure reading occurs with chest pain, severe shortness of breath, new confusion, fainting, a seizure, sudden vision loss, or signs of stroke.
Stroke signs include facial drooping, arm weakness, or difficulty speaking.
These symptoms may indicate damage to the heart, brain, lungs, or other organs.
Seek urgent medical advice if repeated readings are extremely high even without symptoms, or if you develop a sudden major reduction in urine, rapidly worsening swelling, or breathlessness.
Bring your readings and medicine list if possible.
Arrange routine follow-up if your home readings are often above your agreed range, swelling or foamy urine persists, or medicine side effects make treatment difficult.
Routine kidney monitoring remains important even when you feel well.
Every sign above is quoted from the sofidex article on Hypertension-related kidney disease. If you are not sure, err upward — it is always reasonable to be checked.