Hello, My mother's spo2 level keeps fluctuating between 89-92 daily. She is asthma patient and taking foracort 400mcg twice daily. She recently felt nauseaous twice recently feeling as if the room is circling. She said she is fine after few days and told reason could be gastric problem. Could these symptoms be related to asthma? Most importantly, I wish to know whether I should be worried about these fluctuations in spo2 levels. The device shows correct readings for rest of the family members between 94-96, so we believe device is reliable.