We usually find out when the doctor takes our blood pressure and finds it too high. If it is higher it would be considered too high. Blood pressure machines in pharmacies are not necessarily accurate. Best to have physician take your blood pressure and find out whether it is a problem for you or not.
Blood pressure fluctuates off and on during the day, minute to minute, second to second.
Physical activity will increase the blood pressure some but not too high. If blood pressure goes up due to heavy physical exercise it comes down in about 10 minutes. Being overweight, eating too much salt will increase the risks of developing hypertension. Some people who have hypertension may have symptoms such as pressure in the head, ringing in ears, headache, or not feel good. The best thing is to get a complete physical from a good doctor and find out what your problem is.