<s>[INST] Good morning, My doctor checked my blood pressure three weeks ago and it read160/100. The nurses checked it three days ago and it was 166/93. I keep getting headaches, darkness over my eyes, im aftigued and having trouble breathing. I am only 30 and physically healthy. Please advise. [/INST] Hello! Welcome and thank you for asking on Chat Doctor! Regarding your concern, I would explain that your blood pressure values are above the normal ranges. The headaches could be related to high blood pressure. But, at your age it is not normal to have such blood pressure values. That is why, I would recommend consulting with your attending physician and performing some tests to investigate for possible secondary causes of high blood pressure: - a chest X-ray study- a resting ECG-complete blood count for anemia-thyroid hormone levels for possible dysfunction- blood electrolytes for possible imbalance-kidney and liver function tests-cortisol and aldosterone plasma levels for possible a Chat Doctor.  You should discuss with your doctor. Meanwhile, I recommend avoiding salt and caffeine intake and perform a lot of physical activity in order to have a better control of blood pressure. Starting antihypertensive therapy may be necessary if your blood pressure values keep being at this level. Hope to have been helpful! Kind regards,  </s>