What happens to you when you have very low blood pressure?
366165
dizziness and fainting
813319
they will have bad blood pressure
827140
No with that explanation you shouldn't worry! You aren't ill!\nIts a classic case of low blood sugar which triggers low blood pressure. Never go without food and always make time for breakfast. Even one of those cereal bars is better than nothing. \nIn fact for you I recommend carrying them with you.\n \nI would see your Doctor (not urgently)though and tell him about it and ask him to check your blood pressure. As you are small and slim, you aren't underweight or anorexic but you are more likely to have a low pressure reading.
495986
You'll start to feel faint within the first day as your blood sugar drops.  You're body will adjust and start making it's own glycogen to supply energy to the brain after that, but you won't return to 100%.  The normal everday activities you speak of will feel strenuous as your body enters starvation mode, preserving energy for survival.
15164
Usually, there are no noticeable symptoms of high blood pressure. It slowly causes damage to your heart, kidney, and other organs. It can lead to kidney failure if untreated. Normally, you have to have your blood pressure measured to know that it is high. If VERY high, it can cause headaches and other problems.
184104
Symptoms may include headaches similar to what is experienced as a hangover, a sudden episode of visual snow, decreased blood pressure (hypotension), and dizziness or fainting when standing up due to orthostatic hypotension. Untreated dehydration generally results in delirium, unconsciousness, and death.\n\nDehydration symptoms generally become noticeable after 2% of one's normal water volume has been lost. Initially, one experiences thirst and discomfort, possibly along with loss of appetite and dry skin. Athletes may suffer a loss of performance of up to 50%, and experience flushing, low endurance, rapid heart rates, elevated body temperatures, and rapid onset of fatigue.\n\nThe symptoms become increasingly severe with greater water loss. One's heart and respiration rates will increase to compensate for decreased plasma volume and blood pressure, while body temperature may rise due to decreased sweating. Around 5% to 6% water loss, one may become groggy or sleepy, experience headaches or nausea, and may feel tingling in one's limbs (paresthesia). With 10% to 15% fluid loss, muscles may become spastic, skin may shrivel and wrinkle, vision may dim, urination will be greatly reduced and may become painful, and delirium may begin. Losses of greater than 15% are usually fatal
425856
When the body is no longer capable of sweating, core temperature begins to rise swiftly.\n\nThe victim will become confused, hostile, and may seem drunk. Because the body is so dehydrated, blood pressure will drop significantly, leading to possible fainting or dizziness, especially if the victim stands suddenly. As blood pressure drops, heart rate and respiration rate will increase (tachycardia and tachypnea) as the heart attempts to supply enough oxygen to the body. The skin will become red as blood vessels dilate in an attempt to increase heat dissipation. As heat stroke progresses, the decrease in blood pressure will cause blood vessels to contract, resulting in a pale or bluish skin colour. Complaints of feeling hot may be followed by chills and trembling, as is the case in fever. Some victims, especially young children, may suffer convulsions. Acute dehydration such as that accompanying heat stroke can produce nausea and vomiting; temporary blindness may also be observed. Eventually, as body organs begin to fail, unconsciousness and coma will result.
650038
The reason for the fainting is called Vaso-vagal syncope.  In a nutshell what happens is that the brain sends a signal to the body that is out of proportion to the stimulus.  This signals, amongst others, is sent to the heart causing it to slowdown drastically (H.R. 40-50 bpm; Normal 60-100) and a drop in blood pressure.  This reduces the blood supply to the brain and by consequence results in fainting.  When this happens ppl usually feel it coming on and feel hot, clammy and dizzy.  The best way to avoid actually fainting is to lay down flat on the ground and raise the legs up (help blood return to the heart and allows it to be sent to the brain more easily).  This is by no means dangerous apart from the high risk of a fall injury.\n\nFor more information do a search on vasovagal syncope
9499
People that faint in the face of danger, are suffering from a suddenly and significant drop in blood pressure.\n\nFainting is actually a valuable self protective response.When blood pressure drops this way, there is a chance the brain won't get enough blood, because it's at the highest point of the body. That's no good - your brain needs a steady supply of the oxygen the blood carries. So when your body can't get enough blood to your brain because of low blood pressure, it protects you by bringing your brain down to the blood. In other words, the purpose of a faint is to ensure a blood supply to the brain by bringing your head down to the ground, so your heart doesn't have to overcome gravity.
347467
it depends on the situation.  if someone has a slow GI bleed, they can be asymptomatic and have hemoglobins as low as 5 or 6.  However if someone is acutely bleeding, a drop from 14 to 10 may cause dizziness and hypotension.  The biggest factor is if their heart rate is elevated, their blood pressure drops and they feel weak and/or dizzy.
1012377
I also suffer from low blood pressue - lower than yrs actually.\n\nDo u have any sypmtoms of low blood pressure: dizziness, constant tiredness?  If not, then yr current blodd pressure should be fine.\n\nNormal is 120/80.  If u had to choose, low blood pressure wud be better to have than high blood pressure, which brings with it damage to coronary arteries, other arteries and subsequent heart disease.\n\nIf u do have symptoms of low blood pressue(mentioned above) u should visit yr doctor.  There are medicines u can take, but simply adding a LITTLE salt to yr diet will help.\n\nSalt helps u retain fluid, thus increasing blood volume and thereby increasing blood pressure.\n\nExcercise also helps increase blood pressure, and keeps yr arteries and heart in good shape!\n\nIf u decide to donate blood, inform the nurse/doctor present that u have low BP.
794556
Blood pressure should go up as the blood is pumping harder through your body when exercising, although if your head feels weird you might want to go easy, you might have a head cold or something coming. Youll find if you continue exercising your blood pressure goes down even if your working quite hard, this is a sign your fitness level is improving. Just take it at a comfortable pace for you and then build it up at a harder level when you feel its too easy. xx
6331
In certain conditions yes this is normal.  The big question is "How do you (the patient) feel?"  Some people need a low BP and some people have a heart so poor that it is unable to produce a high BP.  When the BP decreases the heart rate may elevate as a compensatory mechanism to help supply the body with blood. In this circumstance low BP high HR is entirely normal. However, if your BP is so low that you are getting dizzy , feel terrible, tired lethargic you may need further medical advice
172466
That's not an abnormal reaction.  Your blood pressure dropped suddenly as you stood, because blood tries to pool in your legs. This is usually stopped by nerves, which contract the veins in your legs ensuring that enough blood returns to your heart and that there is no reduction in the amount of blood that your heart pumps. This maintains the blood supply to your brain.\n\nHowever, if there is pooling of blood in your veins, less blood returns to your heart and less is pumped out which means a reduction in the amount of blood going to your brain. This causes symptoms of dizziness and some people may faint. \n\nIf you have low blood pressure and you also have symptoms of dizziness or faintness when standing up suddenly you should have your blood pressure checked, both when you are lying down and when you then stand up. This drop in blood pressure when you stand up is called orthostatic hypotension.\n\nSee this site http://www.merck.com/pubs/mmanual_ha/sec3/ch20/ch20b.html for an explanation of some possible causes of low blood pressure.
730735
yes all of the answers are good ones. thin blood, anemic, poor circulation , and low blood pressure, if it keep up you need to go to your doctor cause it could be somthing that is serious.
621556
You're right in saying low blood pressure. The average persons blood pressure is around 130 / 70, although this can vary dramatically, depending on your overall fitness, weight etc. The lightheadedness comes from your blood surging down to your feet when you stand up, resulting in a reduced pressure of blood to the main organs of the body.
673276
low potassium or what is known as hypokalemia affects the body in many ways: the early signs are: weakness and muscle cramps, nausia and vomiting. But as the low potassium continues to be depleted the body will begin to paralyze muscles of the lungs and of the heart and the body will begin to have irregular heartbeats and in some cases people have had cardiac arrest (heart attack). Hypokalemia has also been known for people to stop breathing.  Potassium is one of the importaint electrolytes for heart function.  But remeber, too much potassium can also be potentially fatal.