When receiving a red alarm, the very first thing you should do is check on your baby.
If it was not an emergency, it was probably caused by one of the following:
Sock fit or placement issues are the most common cause of false alarms. Even in the hospital, the #1 cause of incorrect readings is poor sensor placement.
Sock Too Loose
The most common issue is that the Sock is close enough to get a reading, but still too loose, causing faint readings. Check to make sure the sensor windows are flat against your baby's skin.
When your baby is feeding, oxygen naturally decreases and pulse rate naturally rises. This can sometimes cause red alarms. If this happens, know that it is normal for most babies.
Check for signs of sickness. Red alarms can be more frequent when your baby is sick or congested. Try using a nasal aspirator to clean out baby's nose. If sickness persists it may be a good idea to call your pediatrician. When to Call Your Pediatrician (American Academy of Pediatrics)
It is common for newborns to occasionally hold their breath for up to 10 seconds. This is called periodic breathing. Learn More
Elevation can affect oxygen level. In higher elevations (like areas in Colorado), baby's oxygen level can sit lower than average. Elevation doesn't necessarily cause red alarms but can make them more frequent.
This is not common but cold feet can cause red alarms. This is because there is less blood flow in the foot for the Sock sensor to pick up. If this occurs, try putting a sock on over the Owlet Sock. Make sure to always observe safe sleeping practices.