If your oxygen saturation drops below 95% on a pulse oximeter, there are several things you can do at home to help bring it up, from changing your body position to improving airflow in your room. A reading of 92% or lower warrants a call to your healthcare provider, and 88% or lower means you should get to an emergency room immediately. Knowing those thresholds is the first step. The second is knowing what actions actually help.
Know Your Numbers First
A normal oxygen saturation reading on a pulse oximeter falls between 95% and 100%. Anything below 95% is considered lower than ideal, and below 90% is definitively low. These numbers represent the percentage of your red blood cells that are carrying oxygen, and even small drops can produce noticeable symptoms: shortness of breath, a racing heart, headache, confusion, or a bluish tint to the lips and fingertips.
If you’re monitoring at home and see a reading of 92% or lower, contact your provider. If it hits 88% or lower, don’t wait. That level means your organs aren’t getting the oxygen they need, and you should head to the nearest emergency room or call 911.
Change Your Position
One of the fastest things you can do when your oxygen is low is change the way your body is positioned. Lying flat on your back is actually one of the worst positions for breathing because the weight of your heart and abdominal organs presses down on your lungs, and any excess fluid in the lungs compresses the tissue that needs to fill with air.
Lying face down, called proning, can meaningfully improve oxygenation. You have more lung tissue toward your back than your chest. When you flip onto your stomach, the weight of your heart and organs shifts forward onto your chest wall instead of your lungs. This opens up a larger area of lung tissue to hold air. It also directs oxygen to the parts of your lungs that naturally have better blood flow, making each breath more efficient. During COVID-19, hospitals used proning extensively for patients in respiratory distress, and it works at home too. You can prop a pillow under your chest for comfort and stay in this position for 30 minutes to two hours if tolerated.
If lying face down isn’t comfortable, try sitting upright and leaning slightly forward with your hands resting on your knees or a table. This position takes pressure off your diaphragm and lets your breathing muscles work more effectively.
Use Pursed Lip Breathing
Pursed lip breathing is a simple technique that slows your breathing rate and keeps your airways open longer during each exhale. It works by extending the time air spends in your lungs, giving your body more opportunity to exchange carbon dioxide for oxygen.
Here’s how to do it: relax your neck and shoulders completely. Breathe in slowly through your nose for about two seconds, keeping your mouth closed. Then pucker your lips as if you’re about to whistle or blow out a candle, and exhale gently through your pursed lips for four to six seconds. The exhale should take roughly twice as long as the inhale. Repeat this for several minutes. You should notice your breathing feels less labored fairly quickly. This technique is especially helpful for people with COPD or other chronic lung conditions, but anyone experiencing shortness of breath can benefit from it.
Improve Airflow in Your Home
The air quality inside your home directly affects how well you breathe. Stale, pollutant-heavy indoor air forces your lungs to work harder. Open windows and doors when weather allows to bring in fresh outdoor air. Running bathroom or kitchen exhaust fans pulls contaminants out of the room and increases your overall ventilation rate. If your home has a window air conditioner, running it with the vent control open also brings in outside air.
Be especially careful about indoor pollution sources. Cooking on a gas stove, painting, using cleaning sprays, or burning candles all release compounds that can irritate your airways and reduce your ability to absorb oxygen. Run exhaust fans during and after these activities, or better yet, avoid them entirely when your oxygen is already low. Keep indoor humidity in check too. Overwatered houseplants and damp areas promote mold and microorganism growth that can trigger allergic reactions and further compromise breathing.
Get an Accurate Pulse Oximeter Reading
Before you act on a low reading, make sure the reading is accurate. Pulse oximeters work by shining red and infrared light through your fingertip and measuring how much light your blood absorbs. Several things can throw off results.
Cold hands are a common culprit. Poor circulation in your fingers gives the sensor less blood flow to read, often producing falsely low numbers. Warm your hands by rubbing them together or running them under warm water before clipping the device on. Make sure your hand is relaxed and at heart level, not dangling below your waist.
Dark nail polish, especially black or blue, can interfere with the light signal. Remove it before testing, or clip the sensor on a bare finger. Movement also causes inaccurate readings, so sit still for at least 30 seconds and wait for the number to stabilize.
Skin pigmentation is a more significant and less well-known factor. Research has shown that pulse oximeters tend to be less accurate on people with darker skin. Darker skin absorbs substantially more red light, which can cause the device to overestimate oxygen levels, sometimes by several percentage points. This means a reading of 95% on a person with dark skin could actually reflect a true saturation closer to 92%. If you have darker skin and your reading is borderline, treat it with extra caution and pay attention to how you feel rather than relying solely on the number.
Understand What’s Causing the Drop
Low oxygen that keeps happening usually points to an underlying condition. COPD is one of the most common causes, a group of lung diseases that progressively limits airflow. Sleep apnea is another frequent culprit. It causes repeated pauses in breathing during sleep, and many people discover their oxygen drops primarily at night. If you wake up with headaches, feel exhausted despite a full night’s sleep, or a partner notices you stop breathing periodically, sleep apnea could be driving your low readings.
Anemia, where your blood doesn’t have enough healthy red blood cells to carry oxygen efficiently, can also lower your levels. Pneumonia, asthma flare-ups, heart failure, and severe allergic reactions are other possibilities. If your oxygen is repeatedly dipping below 95% without an obvious explanation like high altitude or intense exercise, identifying and treating the root cause is the only way to fix the problem long-term.
If You Use Supplemental Oxygen at Home
Some people with chronic conditions are prescribed oxygen therapy for home use. If you already have supplemental oxygen, use it as directed when your levels drop. But the equipment comes with serious safety considerations that are worth reviewing regularly.
Oxygen itself doesn’t burn, but it makes everything around it ignite more easily and burn far more rapidly. A fire near supplemental oxygen can behave almost like an explosion. Never smoke while using oxygen, and don’t let anyone smoke near you. Post a visible “no smoking” sign at the entrance to your home. Stay at least five feet from gas stoves, candles, fireplaces, and other open flames, and keep oxygen equipment at least eight feet from heaters and electrical appliances.
Avoid flammable products entirely while oxygen is flowing: no aerosol sprays, paint thinner, or cleaning fluids. Use water-based lip balm and lotion instead of petroleum-based products, since petroleum jelly and similar products can react dangerously with concentrated oxygen. Wear cotton clothing and use cotton bedding rather than wool, nylon, or synthetic fabrics, which generate static electricity that could create a spark.
Store oxygen cylinders upright in a well-ventilated area, never in a closet or behind curtains where small amounts of vented oxygen can accumulate. Plug your oxygen concentrator directly into a grounded wall outlet. Extension cords are not safe for this equipment. Keep a fire extinguisher nearby and make sure everyone in the household knows how to use it.