Hi doctors when I check my spo2 by oxymeter it gives 99 for 10 to 15 seconds then drops to 90 88 levels I dont have any symptoms ,I dont have any breathing problem my heart rate came 68 and I am not on any medication so why spo2 drops

The fluctuation in your SpO2 readings, dropping from 99% to 90-88% without symptoms, could be due to various factors, including poor circulation, cold hands, movement, or sensor accuracy issues; however, given your normal heart rate and lack of symptoms, it's essential to consult a pulmonologist to rule out any underlying conditions, such as sleep apnea, pulmonary embolism, or cardiac issues, and to determine if further evaluation or testing is necessary.