Hello, Thanks for posting your query on Healthcare Magic... * Brief Answer:white coat hypertension needs to be excluded. Diet with low salt and decaffinated drinks is good *Explanation: My opinion is that hypertension is quite an issue as it is sometimes difficult to control. Proper identification of truely high blood pressure is important. If blood pressure goes up only in medical facilities ,home blood pressure measurement is a must to exclude what we call white coat hypertension. Other secondary causes of hypertension must be excluded by your doctor if resistant hypertension exists. I suggest my patients the following :diet with low sodium and fried food is healthy. Exercise or regular walking helps.regular monitoring of blood pressure is important to follow up the result. The information provided by you is not sufficient to provide a good opinion. If someone comes to me with this condition I would ask them about other comorbidities like diabetes ,heart disease. *Conclusion: I suggest you measure your father blood pressure at home in relaxing conditions and follow up with your physician. If you have any further questions I will be happy to help, If not, you can close the discussion and rate the answer. Wish your father good health.