Spots on penis shaft and base

hi, i shaved a few months back with an electric razor and i think i nicked my skin at the base of the penis. since then a spot has come up and also in other parts of the pubic area. Aside from this there and now prominent and noticeable spots on the shaft of my penis that were never there before. it never looked like this it never had spots that were raised and i have had the same sexual partner over a year now so fear of STI isnt there but i dont know what it is or how i can treat it. any advice would be appreciated if anyone has had anything similar or knows what / how to treat whatever this may be. Thanks! [

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