Unexpected or inaccurate readings
What to do when a heart rate, SpO2, or sleep reading looks unusual, without jumping to conclusions.
Last updated: July 13, 2026
Wearables measure through the skin, so readings can vary for ordinary reasons. If you see a heart rate spike, an SpO2 dip, or a sleep score that does not match how you feel, start with the practical explanations below.
Common causes of odd readings
- Motion artifact. Waving your hands, exercising, or a loose fit can produce brief spikes or gaps.
- Poor fit. If the ring can slide or spin easily, the sensors may not line up with your skin. See the Sizing guide.
- Low battery. A nearly dead ring may collect lower-quality data.
- Cold hands. Very cold fingers can reduce blood flow and make optical readings harder.
- Tattoos or scars over the sensor area. Dense ink or scar tissue can block optical signals.
- Short wear time. Metrics like sleep staging need enough uninterrupted data to produce reliable outputs.
What not to do
A single unusual reading does not mean something is medically wrong. Pulsyn is a general wellness device, not a medical monitor. Do not use it to diagnose, treat, or monitor any medical condition. If a reading worries you, consult a qualified healthcare provider.
Steps to improve accuracy
- Check the fit. The ring should feel snug but not tight. It should not spin freely.
- Wear it on the right finger. The sizing guide recommends the index, middle, or ring finger for best signal.
- Keep the sensors clean. Gently wipe the inside of the ring with a soft cloth.
- Charge the ring. Low battery can affect data quality.
- Wait for a fuller dataset. Some metrics improve after a few nights of consistent wear.
When to contact support
If a metric stays clearly wrong after several days of good fit, clean sensors, and full charges, email support@pulsyn.tech. Include the metric, the date, and anything unusual about how the ring was worn.