Aa
Light-headed
I have been getting lightheaded when standing up. From what I researched (if it is correct) it is common. I was wondering though if it is a problem if it happens as frequently as 2-5 days. I do have allergies and had a major reaction after hiking through the wood (planning on getting tested to see what i'm allergic to). I am 16 years of age and male. I am not sure if it has anything to do with it, but my fingers sometimes lock up for a few seconds if I'm pulling object with fingers extended (at work).
Best Answer
Light-headedness can have many causes. Most commonly I think it has to do with blood pressure and/or heart rate. It could also be low blood sugar. You should see your doctor for an accurate diagnosis and treatment.
Have an Answer?
You are reading content posted in the Undiagnosed Symptoms Community
Discharge often isn't normal, and could mean an infection or an STD.
In this unique and fascinating report from Missouri Medicine, world-renowned expert Dr. Raymond Moody examines what really happens when we almost die.
Think a loved one may be experiencing hearing loss? Here are five warning signs to watch for.
When it comes to your health, timing is everything
We’ve got a crash course on metabolism basics.
Learn what you can do to avoid ski injury and other common winter sports injury.
The most common cause is simple dehydration. The volume of fluid in the system is simply inadequate.
Another common cause is failure of your peripheral vasculature to immediately compensate for standing. This affects what is called "body capacitance". That is, the quantity of blood contained in the vessels remains the same, but the volume available in the blood vessels varies because of muscles that contract or relax around the blood vessels. Normally, when a person stands the vasculature in the legs automatically compress around the vessel and autotransfuse a liter of blood upwards to the head. This is the principal benind the MAST, or military anti-shock garments and the pneumatic "g" suits worn by pilots.
If this is the problem, the reason must be found. Very ocasionally it is due to a neurological disorder, such as Parkinsons disease. It could be due to simple calcium deficiency. Calcium is necessary for musculature contraction.
An allergic reaction could also cause the vasculature to dilate, which could contribute to the problem.
Sometimes a co-factor, such as anemia, or a low red blood cell count (called a hematcrit) is at work.
You probably don't have a life-threatening situation, but you need to bring this to the attention of your physician at the next appointment. If the problem is interfering with schoolwork get an appointment as soon as possible.