Why is blood pressure high during hospitalization? There are many reasons for this: First, you are out of your normal living environment and living in a hospital, which is a kind of group life, the whole noise and quiet level is not as good as your own bedroom, so you may not sleep as well as before. The second, you are still in the hospital during the time of illness, you will be more or less nervous, nerves can not fully relaxed, this state of stress will lead to maintain blood pressure in a high pressure state. When you get home from the hospital, these conditions have improved, sleep better, eat better, relaxed, feel healed, blood pressure naturally it will go down, can control down, plus the auxiliary drugs will gradually return to normal, this is a relatively common phenomenon, do not need to be nervous.