Worried about Mark on tip of Penis

I have had this mark (photo attached) on the tip of my Penis for a couple of months now and i am beginning to worry - does anyone know what this may be? Should I book in with my GP or it just a harmless mark? It is worth noting that I do suffer from quite a tight foreskin and occasionally get mild balanitis due to this.

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Hi I’d book an appointment with your doctor for a proper diagnosis. It could be lichen sclerosus

preferrably a dermatologist