Your oxygen level drops when you walk because the muscles require more energy when they are working and active and oxygen plays a role in generating the needed energy.
Your lungs are not able to get enough oxygen into the bloodstream to feed the demand so the blood oxygen levels drop.
You can have shortness of breath but oxygen level is normal which can be caused by strenuous exercise, over exerting yourself, have congestive heart failure or heart failure or other conditions.
When your blood oxygen levels are too low it can lead to bluish color in skin, lips and fingernails, confusion, wheezing, coughing, rapid hear rate, difficulty breathing or shortness of breath and headache and if the blood oxygen levels drop too low and get dangerously low it can lead brain damage and even death.
Your normal oxygen level should be between 95 percent to 100 percent.
When your oxygen level drops below 95 percent then it's considered low and can become dangerous.
A dangerously low oxygen level while sleeping is below 93 percent and when the oxygen level drops below 88 percent then it's more severe and more dangerous and you should seek prompt medical attention.
The symptoms of low oxygen levels are bluish color in skin, lips and fingernails, confusion, wheezing, coughing, rapid hear rate, difficulty breathing or shortness of breath and headache.
80 is a low oxygen level as when the oxygen level drops below 85 percent the severe lack of oxygen affects the brain and can cause vision changes and loss of consciousness.
When your oxygen level drops below 80 percent then the brain, live and other vital organs are affected and can lead to death.
A critical oxygen level is 88% or lower and you should get to the emergency room as soon as you can.
If you're using an at home oximeter and your oxygen saturation level is 92% or lower then you should call your doctor.
The normal oxygen saturation level for adults is between 97 percent to 100 percent and older adults will usually have lower levels of oxygen when compared to younger adults.
If someone is older than 70 years of age then a normal oxygen level can be around 95%.
Low oxygen levels can be dangerous if the oxygen levels in your body get way too low.
The normal oxygen level reading should be between and in a range of 75 to 100 millimeters of mercury (mm Hg)
If your oxygen level drops slightly below that level then there's likely not a serious health issue and you likely have nothing to worry about.
But when your oxygen levels get way too low then it can cause serious health issues and may even cause death and brain damage.
If you think your oxygen levels are too low then you need to see a doctor or go to urgent care for treatment to get your oxygen levels back up.
You may need to use oxygen to breathe properly if your oxygen levels drop way too low or stay too low.
Oxygen levels can sometimes drop a little which is normal but they should not drop a whole lot.