My first thought is a chronic bleeding lesion, where you are losing blood over a long period of time. This could be anything from excessive menstruation flow to a bleeding stomach ulcer to a cancer.
I would suggest seeking medical attention immediately - if this has been going on for over a week, it obviously is not going to get better on its own.
There are many things that can cause a person to feel nauseous. Pregnancy is one common cause. An upset stomach from something a person ate could make them feel that way. Motion sickness is another cause.
Two causes of blood pressure changes that might occur in a person within a given day are, cardiovascular system and the heat that comes off the heart.
yes, a pressure cooker would come in VERY handy on top of Mt. Everest. This is because the pressure lessens as you ascend which causes your ears to pop.
Becomes from and dry
Heat stroke often causes a drop in blood pressure, which in turn causes the disorientation and often deliriousness.
You feel weak, dizzy, nauseous, and eventually very sleepy.
"Noise" is just a broad category of sound that doesn't happen to be organized. Sound that is organized might be called music or speech. Sometimes a hum or a buzz might be classified as noise by one person but not another. With that said - noise, like any sound, is just a series of pressure waves. The energy of sound is pretty evident when the pressure waves are especially intense - such as in an explosion. There more subtle examples when sound causes a surface to vibrate and causes it to gradually warm up.
An abnormal increase in venous pressure may indicate a problem with one of the heart valves. It could also mean that the person is on medication that causes higher blood pressure.
There is no known cause to the disorder, but in my opinion personal feeling, a person who has low self-esteem. It causes the individual to feel rejection and an alleged pressure from society. As a result an anorexic person is always looking for perfection.
Atmospheric pressure
A CPAP machine can damage a person'a ears. The CPAP blows air into the middle ear using pressure and causes problems that are difficult to treat.
Prazosin is a pill that is usually prescribed to treat high blood pressure. Prazosin can cause dizziness, or faint, and usually cause the person to have low energy.