Ah I read your profile and you are 34 so have had this happen for many many years with no progression so I'd say it is unlikely to be anything serious. I would just mention it next time you're there for another reason rather than make a special trip just over this.
I wonder why you have started to worry about it 20 years down the track.
Take care.
Well it depends if you are now only 13 or whether you have had this happen for many years.