There is noise on the left hand side of my AirPods
when I use the AirPod, I can hear noise on the left hand side which makes me feel uncomfortable.
Question marked as
Which AirPod model do you have?
There has been a Service Program for some AirPod Pro models, that have been manufactured before October 2020:
AirPods Pro Service Program for Sound Issues - Apple Support
Did you already try the troubleshooting mentioned in this related article?